I was thinking you would say the use of stop loss should be  important to a trader so that even if they have open trade and something like hack happens to the exchange, the trader already knows how much could be lost because of SL used or incase of profit, TP.

Whatever has advantage also has it own disadvantage. Don't you think having multiple options for trading can also increase your risk appetite because you can as well transfer funds to all accounts and tempted to trade them simultaneously or entry trade in one account because the other account is losing. It is dangerous and moreover you are still talking about CEX.


The risk of something going wrong with an exchange should not be a reason enough to run multiple trading account, it is going to be stressful and confusing.