Because he is smarter than you ? POS, if well done, is much better than POW. No pos projects have been attacked so far, and they were first gen. Look, i am a small miner and for me ofcourse POW would be better, but not for the project. To attack pow all you have to do is rent hashing power, to attack POS you need to buy alot of coins and that alone would drive the price through the roof. And, as i've read, they will make it so that the incentive will be to play fair, otherwise stakers will lose money.
Bitcoin will never move away from POW because the whales that bought equipment for milions and that OWN most bitcoins and all the hashing power want it that way, to milk it for years to come. After the milking is done, when the halvings will make it unprofitable to mine since there gonna be very few idiots that'll buy bitcoin for 3-10k $ just to make it profitable for the whales, they'll just move on. Won't matter, their bitcoin will be long dumped by then.
PoS can be done only after it has a big community and usage, otherwise the price will go lower and lower.
