Yes, I already pay no dollar per month for storing my photos in a folder and it's not used to train any AI model.
I do both, folders for backup, Immich for indexing and mobile access. Real simple docker compose file I wrote once to get the whole thing going years ago.
Doesn’t have to be either or, and a dumb folder only accomplishes a portion of my needs.
What are you trying to communicate to us? Maybe you are just trying to tell people that they can get away with simpler solution if all they care about is unscheduled photo backup. If so, I feel there is a less antagonistic way for you to say it.
Otherwise I think Immich seems like a cool project, and I hope they're successful.
I added the part about putting photos in a folder, to at least contribute with a different solution, which for me has worked very well for very long.