[elashri]

You can pay customary $10 per year to bitwarden to support and still selfhost valultwarden. Some people want to have control and don't want to have to deal with VC money getting in the way (1password was a hard learnt lesson). Also vaultwarden seems lot cleaner and easier to install and manage than official bitwarden server. And you still rely on their clients.

[Uvix]

Vaultwarden used to be a lot easier to install, but the official server also has a single-container option now: https://bitwarden.com/help/install-and-deploy-unified-beta/

It's technically in public beta still, but I've been using it for a year and a half without any issues.