Your opponents have all the chips. Attacking here is totally defensive. You are on the endangered species list and need to survive. Your enemies on the other hand, with their medium and big stacks, don't want a fight against an aggressive attacker. They have enough chips to let you steal their blinds without it mattering to them, or give up a pot on the flop.
Defensive tactics come in many shapes and sizes.
Make your opponents fight on your turf, on your terms, when you want to. Or have them turn and run. You win either way.