Security is definitely the most important factor or if money is stolen, it would be fair to refund it from their frozen balance.
Secondly, it may be decentralization. So managing our exchange wallet with private key is fair. Exchange is like a prison, ''restrictive''.

Im looking for exchanges site who are have support daily and the security is very secure and the features will be updated everymonth and the withdrawals is instant and the deposited is only takes only 1 confirmation to use it and also the withdrawa fees and I think if that cryptocurrency exchanges site have that for surr most trader will be register and trade to them and Binance is the most perfect example for that who are the most trusted and popular exchanges site in crypto community.