Under equal conditions, spot trading cannot be more profitable than futures, since futures trading uses margin and, accordingly, the profit will be large. Accordingly, if the price moves in the opposite direction to your expectations, then the losses will be correspondingly greater than in spot trading.
The profit might be more in comparison to spot trading but so is the risk. Spot is at least safer that you are holding the asset at hand even after changing it to another coin - you should be able to sell it again for something else. While in any other form of trading you are essentially gambling with your asset's price prediction and hence can quickly get washed away.
For beginners, spot is the way to go, they should learn the pros and cons of all these different forms of trading, other than spot, I dont recommend them to anyone.