Just because they can doesn't mean they should, as simple as that. As I said thorough bred race horses can pull carts, but that doesn't mean they should. If your air frame is optimized for nullifying aerial threats, then you might as well use it as an air sup a/c as it's primary role, for secondary role it can indeed be used as a bomb truck, for tertiary roles as recon, delivering courrier , whatever you want. Mig 35 can do it all.
My contention is, it is an exceptionally nimble, agile dogfighter, and should be used to provide air cover to strike formations. That is where it would excel, it doesn't mean it would suck at ground attack.