The thing about google is not only that they get to know where you go, but that you get a map that is biased by advertisement.
I know many people who don’t care about privacy or who believe they can’t prevent being “spied at” anyway, so these considerations don’t influence their behavior. Nothing to hide etc, but getting a map that is worse for their purpose than it could be, just because someone paid to have an advantage over organic rating and importance, maybe can convince so of them