The apple is no good comparision, as it's meant to be hygienic. Unless anyone wants to eat the minifigure and the bag alike, which I really hope nobody'll try, those are completely different goods.
And yes, I'd feel a product if I'm not convinced by it's quality or if it's really what I want, and if feeling might help answering these questions, without damaging or unsanitizing the product, I'd most certainly do so. Or not buy it.
And honestly, isn't the problem of certain people not getting what they want the same with every product of a limited availability on the free market? First come, first served.
And on the other hand, where's the difference if an army builder is unhappy because he's got only few Romans for a horrid amount of money while a kid whose interest in LEGO will propably fade during the next few years gets it's Roman? (I'm aware I'm being highly unsocial right now, of course it's not my opinion that army builders are more important than children, I'm just giving a drastic example from a different point of view.)
I myself am no army builder, and neither am I collecting the series, I'm merely picking the ones I need, and I don't want to end up with a lot of fitness trainers and boxers after buying these figs. As a customer, I want to know what I'm buying.
Also, to me it's part of the fun to feel them in order to get the right one. And feeling the bag isn't too accurate, IMO. I use to feel things I have no idea what they could be all the time, which most often leads me to give up and feel the next one. But I can't stop wondering what they might contain.
I'm playing as Li'l Peanuts in def's Eurobricks II Mafia: Mafia School
Henry Sicariul, Level Eight Rogue
22 Years old Male Human
Power: 17 Health: 15/15 (14+1) Gold: 0
Inventory: Rapier of Sem (WP 9), 2 Potions, Bedroll, Vial of Poison, Telescope, Fire Bomb, Smelling Salts