Ahhh, the thing is, Peter isn't just human, he's superhuman and as he rightly says there, loss of control when you have superpowers is not a good idea. When you're strong enough to lift a bus over your head, taking something that causes a loss of control isn't something that Peter would (previously to BND) do.
I'm sure he's been to enough weddings to know that some random suppervillain could turn up at any second and start trashing the joint, so being drunk out of your mind isn't sensible.