For the ones that allow you to, yeah. But how would you e.g. easily disable/delete Google Play Services (say, if you didn't want Google on your phone)? The disable option is disabled.

Also, even when I try disabling some of these built-in Google apps that I supposedly can disable, I get a prompt warning me that "If you disable a built-in app, other apps may misbehave"... you can't keep a straight face telling a user "oh but you can easily disable this!" when you yourself are telling them the consequence is that it might break other things on their phone. (!)