PipeWire failing to open devices and loading libspa-alsa

It looks like PipeWire is failing to open a bunch of video devices, and preventing pulseaudio from grabbing the ALSA device. Relevant logs:

sept. 12 10:41:05 camille dbus-daemon[558]: [system] Activating via systemd: service name='org.freedesktop.RealtimeKit1' unit='rtkit-daemon.service' requested by ':1.63' (uid=1001 pid=809 comm="/usr/bin/pipewire " label="unconfined")
sept. 12 10:41:05 camille pipewire[809]: [W][000000007.458703][module-rtkit.c:499 idle_func()] could not make thread realtime: Permission denied
sept. 12 10:41:06 camille pipewire[834]: [E][000000007.515307][alsa-udev.c:206 emit_object_info()] can't open control for card hw:1: No such file or directory
sept. 12 10:41:06 camille pipewire[834]: [E][000000007.515585][alsa-udev.c:206 emit_object_info()] can't open control for card hw:0: No such file or directory
sept. 12 10:41:06 camille pipewire[834]: [E][000000007.516739][v4l2-utils.c:66 spa_v4l2_open()] v4l2: Cannot open '/dev/video0': 13, Permission denied
sept. 12 10:41:06 camille pipewire[834]: [E][000000007.516906][v4l2-utils.c:66 spa_v4l2_open()] v4l2: Cannot open '/dev/video1': 13, Permission denied
sept. 12 10:41:06 camille pipewire[809]: ALSA lib seq_hw.c:466:(snd_seq_hw_open) open /dev/snd/seq failed: Permission denied
sept. 12 10:41:06 camille pipewire[809]: [E][000000007.527659][alsa-seq.c:59 seq_open()] open failed: Permission denied
sept. 12 10:41:06 camille pipewire[809]: [E][000000007.527760][module-node-factory.c:167 create_object()] can't create node: Permission denied
sept. 12 10:41:06 camille pipewire[834]: [E][000000007.527958][core.c:72 core_event_error()] core 0x5580b0326570: proxy 0x5580b033a810 id:3: seq:3 res:-13 (Permission denied) msg:"can't create node: Permission denied"
sept. 12 10:41:06 camille pipewire[834]: [E][000000007.527965][media-session.c:1936 core_error()] error id:3 seq:3 res:-13 (Permission denied): can't create node: Permission denied
sept. 12 10:41:06 camille pipewire[834]: [E][000000007.527970][core.c:72 core_event_error()] core 0x5580b0326570: proxy 0x5580b0343b50 id:4: seq:4 res:-2 (No such file or directory) msg:"can't create device: No such file or directory"
sept. 12 10:41:06 camille pipewire[834]: [E][000000007.527973][media-session.c:1936 core_error()] error id:4 seq:4 res:-2 (No such file or directory): can't create device: No such file or directory
sept. 12 10:41:06 camille pipewire[875]: [E][000000008.061369][core.c:72 core_event_error()] core 0x55d8e2309b90: proxy 0x55d8e22e57c0 id:4: seq:4 res:-2 (No such file or directory) msg:"can't create device: No such file or directory"
sept. 12 10:41:06 camille pipewire[875]: [E][000000008.061383][media-session.c:1936 core_error()] error id:4 seq:4 res:-2 (No such file or directory): can't create device: No such file or directory
sept. 12 10:41:06 camille pipewire[852]: [E][000000008.063685][alsa-pcm.c:40 spa_alsa_open()] 'front:0': playback open failed: Device or resource busy
sept. 12 10:41:06 camille pipewire[852]: [W][000000008.063694][adapter.c:175 find_format()] adapter 0x559ed0705b70: can't get format: Device or resource busy
sept. 12 10:41:06 camille pipewire[852]: [E][000000008.063698][module-adapter.c:231 create_object()] can't create node: Device or resource busy
sept. 12 10:41:06 camille pipewire[852]: [E][000000008.063848][alsa-pcm.c:40 spa_alsa_open()] 'front:0': capture open failed: Device or resource busy
sept. 12 10:41:06 camille pipewire[852]: [W][000000008.063853][adapter.c:175 find_format()] adapter 0x559ed07b6d30: can't get format: Device or resource busy
sept. 12 10:41:06 camille pipewire[852]: [E][000000008.063856][module-adapter.c:231 create_object()] can't create node: Device or resource busy
sept. 12 10:41:06 camille pipewire[875]: [E][000000008.064089][core.c:72 core_event_error()] core 0x55d8e2309b90: proxy 0x55d8e2432420 id:42: seq:145 res:-16 (Device or resource busy) msg:"can't create node: Device or resource busy"
sept. 12 10:41:06 camille pipewire[875]: [E][000000008.064100][media-session.c:1936 core_error()] error id:42 seq:145 res:-16 (Device or resource busy): can't create node: Device or resource busy
sept. 12 10:41:06 camille pipewire[875]: [E][000000008.064105][core.c:72 core_event_error()] core 0x55d8e2309b90: proxy 0x55d8e243bdc0 id:43: seq:146 res:-16 (Device or resource busy) msg:"can't create node: Device or resource busy"
sept. 12 10:41:06 camille pipewire[875]: [E][000000008.064109][media-session.c:1936 core_error()] error id:43 seq:146 res:-16 (Device or resource busy): can't create node: Device or resource busy