Before placing a bet, we should do all the math as how much amount we will lose if the bet goes against our plan and how much we gain in case of a win. I would never risk my money on bets with very low amounts as my risk reward ratio will be disturbed.
In gambling, you need to make sure you get enough rewards that make you satisfied because you are risking your money in the gamble or bet. People with no plan or no money management sense will bet blindly and may not be profitable in the long run (although they may get some wins in the short term as they never calculate the risk reward ratio and jump in every game)