VMware is a highly complicated piece of software relying on a lot of internals of how macOS works. I think it's reasonable to expect that it won't "just work"

I don't say you have to update, but in time security updates will no longer come for your version of macOS and in addition to that you will won't even get new features, like in the new macOS Version the openssh version is newer and now almost fully supports yubikey ssh keys stuff like that.