BTC liquidation heat map & this really worries me!!!

I’m no crypto expert, but I don’t understand why whales, knowing the market could move against them at any time, take short-range (liquidation point much closer to the entry point) long/short positions like this 🤔 isn't this pure gambling or do they know something, that we don't know?

$BTC

BTC
BTCUSDT
66,399.9
-3.35%