It's understandable. Mahirap kainin ang helmet, mahirap lutuin ang betamax (in the sense that it quickly gets that off taste if isn't fresh or prepared properly).

There was a time in my life though where our family survived on betamax as it's the cheapest item in the menu. Basta may matinong sauce, okay nang pang-ulam! On the other hand, rare lang din akong kumain ng helmet since makalat syang kainin. You either have to make sure that the little bones are chewed properly, or spit them out. I like the skin and the soft parts inside of it though. I'm also the kind of weirdo who'd dig deep inside fish heads for any available meat or soft parts, so I fully accept that helmet is probably not for everyone (and neither does fish heads).