Given the profitability x return of investment, I'd say only idiots are buying and mining with gpus and yes there are too many idiots out there, I do not see anything wrong if somebody has a gpu and start mining cause maybe he did not mainly buy for mining so that is okay, now for somebody to actually pay $450 to earn $0.60 per day is unreasonable.

Also I said 80% of the hashrate from december 2017 - to right now are asics.