Trading is much better than gambling. Because you can lose a lot of money with gambling and that is all wasted and so bad.
But with trading you have it under control so you can know when to stop or just going further. You have also a higher chance to make some profit.
Trading only be a gamble if you do not know what you are doing. But if you have the right knowledge and skills, then it is not a gamble. If you lose, it is not because you are unlucky but because you made a mistake in your analysis.