MBTs make plenty of sense even if tank on tank fighting is rare. Having a big cannon that can fire high explosive rounds with a laser rangefinder in an armored enclosure is pretty useful even if you're not fighting tanks. Many western tanks have also been retrofit with additional armor against chemical rounds and mines, or have active protection systems.

Being in a T-72 with an armor configuration from the 80s and a carousel auto loader in the middle of the crew compartment in a war where your enemies have top attack atgms with tandem warheads would suck a lot though.