Depends on how small the withdrawal is. Most exchanges have a minimum and you can't withdraw below that minimum.
Also you will be paying double fees for 2 withdrawals. For example the withdrawal fee is 0.0005 BTC on Binance - more than $5. It is not exactly cheap if you are not dealing with a lot of money.
Their withdrawal limit is 0.002 BTC - more than $20. If it is a small amount the user might not be able to respect these limits to make two withdrawals.
Thanks.
I would like to give explanation: that point focuses on altcoins. Withdrawal fees with altcoins are cheaper.
BTW, you remind me that it is important point that I forgot to write in OP.