Indeed. Also, selfhosting is just shuffling the costs, not saving money. Doing it yourself still requires you pay for a server(s), but now you have to wear all the hats and maintain a production system. Which is fine, this is /r/selfhosted after all, but either you pay with money + time, or pay someone else money that does this for a living. It's not a waste.

I usually do the autofill prompt on mobile, even when I know there isn't an entry, then I create an entry in bit/vaultwarden, and use that to autofill.