Basically he will not lose $80 if he did not sell his polygon as he can keep holding it till the price to increase again.
This is the double edged sword situation when we are dealing with crypto, sometime the price can give us a significant lose but on other time it can give significant profit.
Will he complain if the price increased significantly after he received the withdrawal? I dont think so...
I guess he needed the money urgently which is why he converted it to FIAT though this wouldn't have been an issue in some countries where there is a clear premium on the conversions.
Also, he could have stuck to stablecoins like USDT etc if he was so worried about the volatile price movements of crypto.