I've had Immich auto updating alongside around 36 other docker containers for at least a year now. I've very very rarely had issues, and just attach specific version tags to the things that have caused problems. Redis and postgres for example in both Immich and Paperless-NGX have fixed version tags because they take manual work to upgrade the old databases. The main projects though, have always auto updated just fine for me.
The reason I don't really worry about it: Solid backups.
BorgBackup runs in the early AM, shortly before Watchtower updates almost all of my containers, making a backup of the entire system (not including bulk storage) first.
If I was to get up in the morning and find a service isn't responding (Uptime-kuma notifies me via email if it can't reach any container or service), I'll mess with it and try to get the update working (I've only actually had to do this once so far, the rest has updated smoothly). Failing that, I can just extract yesterday's data from the most recent backup and restore a previous version.
Because of Borgs compression and de-duplication, concurrent backups of the same system can be stored in an absurdly small amount of space. I currently have 22 backups of ~532gb each, going back a full year. They are stored in 474gb of disc space. Raw, that'd be 11.8TB
They're well aware of the crisis; they just don't care to support the people affected by it.