I don’t think it's necessary to use high leverage to be consistently profitable in futures trading. It's just a matter of studying technical analysis, chart patterns, following the market (depending on your availability, this can be a difficult talk) and operate with low leverage with around 1 - 3% of the total bankroll.
However, if you want to have fun and feel a bit of adrenaline, high leverage becomes appealing, and it's really exciting when the price goes in your favor.
When you use leverages, you become more greedy and it's same with everyone. Each person has own risk acceptance and risk management so using low or high leverages, it's personal choice.
My main point is using high leverage with small capital likely results in False Safety in mind of traders. Practically, if you open a bad position, and don't close it proactively, it will be liquidated and it's false thinking that a small loss is not a loss, and many small losses over time won't sum up to big net loss. It's False belief in leveraging small capital.