Losing and losing money is an integral part of gambling, it is something that no player can avoid, but everyone can control how much he will lose, or rather everyone can control it, but not everyone does. Sometimes the game for fun goes too far and the loss becomes too big if you do not stop in time. And maybe it is even better if the player is afraid of losing money in gambling from the very beginning, because such players will be very careful from the very beginning and may not even allow big losses.
Yes, this is the voice of reason.
It is true that you cannot control if you are going to win or lose, although most probably you will lose.
But what you can actually control is the amount you bet, and therefore the amount you eventually will lose.
Having that under control is basically the key.