Zobia I think it depends on the person. There are many TV actors who have successful marriages with non-actors. I recently saw Shahood Alvi with his wife and they seem so content together with their daughters mA, also Aijaz, Adnan Siddiqui, Humayun (who we know personally and people give misaalein of his love for his wife Samina), Nadia Hussain, etc etc. Yeah there are divorces but not just among showbiz people, they occur everywhere else too. An understanding spouse is necessary whether you’re a busy actor, model, doctor, engineer, executive or in any profession for that matter. For instance, doctors are also busy people with off timings, not to mention surrounded by nurses, female doctors and sometimes goodlooking patients 
I don’t think actors should be stereotyped. It is the character that matters.