well first of all, how are you sure that these transactions are people moving bitcoin from their wallets to exchanges?! i say it is people moving bitcoin from exchanges out to their wallets! i bet you haven't thought about that possibility yet.

secondly, the price is mostly affected by traders who are keeping their coins+money on exchanges ready to go, not from some dude who doesn't know he has to pay a higher fee if he wants a faster confirmation. and those who know will pay a higher fee, even 800-2000 satoshi/byte (check the blocks that are mined and you will see these).

and finally the price fell hard from $19000 to current price recently and the unconfirmed transactions were still high at 100K+. how do you explain that?