Losing anonymity because you go around all day in the same car and people are keeping track of you from location to location is not something people normally worry about. Spies might worry about that sort of thing, but most people don’t (maybe we should, given the state of public surveillance in some countries, but I think it is a not intuitive concern for most people).

The intent of a disguise is to, well, disguise the user. You’ve described a sort of bad disguise, like something somebody might put on in a comedy movie, but that’s because a disguise that people can easily see through is a punchline.

Incognito mode isn’t like a bad disguise anyway. It is like no disguise, it does absolutely nothing to obfuscate who you are.