Most firearms are designed to take a knock. They aren't built out of bone china.
If they couldn't take the occasional drop off a table they'd never have been shipped, too many chances for law suits.
Now I wouldn't take a 15/22 that's done freefall from 30 000' but off a table? I'm willing to bet it survived better than the optic did.
This is where "pay for what you get" comes in. The cheaper knock off Aimpoints won't survive much abuse, but the real ones could be thrown around the range, onto hard surfaces, and they'd still work.
But again, most things are designed to be "used", which does involve a certain amount of abuse.
Berate your friend, give it a once over, enjoy.
KBK