I don't save browser cookies for obvious privacy reasons and it's absolutely a big deal to not need to pull up some program and copy paste my login details constantly for every site.
If I ever need to fill the login, I just do any of these:
- KeepassXC has auto-type feature, so I just choose the needed one and let it auto-type - I enable the extension only when I need to log in and choose the one I need to fill (not auto-fill, but only fill when I click on the account from the extension pop-up dashboard).