That's total nonsense ! You're not in the States where you would avoid a $6 steak, you're in the Philippines where 299 pesos is a respectable sum of money. Especially to a member of the indigenous population who likely doesn't earn that amount on a daily basis, when used correctly, a marinade would not only tenderise but add great flavour ,too. Especially papaya which is found in abundance. Wrap meat in papaya leaves for a few hours or overnight and you will find your tiny "poo" ( poo, really), nicely tenderised . Of course, it could be the person cooking it that is ignorant of this basic technique.