This is getting long in the tooth… bitwarden browser plugin asks for password often. My master password is long. I have more than one computer and I use 2 browser. This quickly adds to up 4 instances of login in…
You could set up a lock/unlock-routine (instead of logging out/logging in) - e.g. via PIN (Unlock with PIN | Bitwarden Help Center) or biometrics (Unlock with Biometrics | Bitwarden Help Center). But be aware of the fact, that by locking, you are still logged in and then there is vault data locally stored - if e.g. you use the non-biometric PIN, it then will be encrypted as strong as that PIN is.
BTW: I know, it’s already bothering you enough - but I didn’t read something about 2FA. If you didn’t set it up already, you should do so. (and that doesn’t have to be much of an additional annoyance, as e.g. you can set it to “remember me” on devices/apps, if you wish)
I am of the opinion that you should force yourself to type in your password somewhat often to either log into or unlock your vault, as a way to get that password ingrained in your memory.
But to answer your question, if your PC is kept locked or logged out unless you are using it, then setting your BW browser extension to simply Lock after 15 minutes should be plenty safe. This also, again, forces you to type your password in periodically.
Though I agree in general with that, I have a few “but’s”:
you shouldn’t rely solely on memory - the master password must be on some kind of emergency sheet, because no matter how hard you try “ingrain it in memory” - human memory is not 100% reliable
with “login with passkeys” and “login with device”, the master password is not that important as it was (before I create a misunderstanding here: I only mean not that important to remember and to constantly type in - of course the master password itself is still important)… these days I’m seldom in need of entering my master password (and have it stored in multiple ways), so that I don’t need to have it in my human memory any more