binance limits the users from making an order below 10 USDT is to prevent spam orders.
if they are allowing the users to make a low trade, the bot will spam the orders and it might affect the exchange performance in executing the orders.
there might be another reason for this, but this is what I heard on other exchanges.
well it's the same when you trade pairs with BTC or ETH, you have to trade at least 0.01, that's right because there are lots of bots trading with smaller amounts so it looks like spam, I often see it in latoken p2pb2b and some other exchanges , very strict binance for that is not a place for small investors to play there