There is a big difference between "leverage" and "use of capital" in my opinion.
A perfect example is the opening only strategy that our traders make so much money with. They "use" a few $million to enter the orders, knowing full well that they will only be filled on 5-20 stocks for the most part. This allows for some traders to make a good 6 figure income just trading the firs half hour.
Leverage implies buying or selling more shares, which is helpful after you're doing well, but not always the best use of capital.
Market making, mergers, pairs, automation, etc., in general, is capital intensive even though they are often lower risk and higher reward.
Don