We’re all using all sorts of technology despite partially or even strongly disagreeing with its foundation because it provides the best or safest option in a given scenario.
Discouraging people from using the only commercial password manager out there that’s widely recognized as safe because they decided to support a popular operating system that happens to have a controversial founder (and not even supporting that person directly) does a lot more harm to users’ safety than good without providing recommendations for safer and more usable alternatives.