Marketing people like the features they're getting, and Google and Meta are dominant, so big that they're the default, in the same way that we talk about github being the default option, and "no one ever got fired for choosing IBM / (big tech company of your choosing)". I wouldn't dream of saying they should choose something else, without researching and guaranteeing that nothing they'd ever want from GA (and they may not know everything they'll want in the future right now) is missing in the alternative. In a role (marketing) that's completely out of my wheelhouse. So I don't even bother.