I believe you can still self-host if you want. I don't understand how can you be disturbed by offering a cloud service to host your passwords could be bad to switch. I'm happy sub of 1Password and i self-hosted my passwords before for a long time.
I expect they probably pay more attention to abnormal access than most self-hosted users would as well, so you'd actually know about a data leak faster so you could rotate your passwords.
Realistically, which is more likely? 1) That 1Password gets breached and loses their customer information, or 2) that I install Bitwarden on my server, somebody discovers a hole in it, I don't hear about it for a while (or do but don't have time to update), and get all my passwords stolen?
For me, the second seems more likely, so I'm happy to stick with 1Password.