Yeah, I have seen Dragonball Z. I like that parallel too. It's amusing and basically captures what I was talking about.
I recognize that seemingly multiplicative effect as well. However while you could certainly see more force applied over greater displacement in a shorter time by exercise of this immaterial power, it's highly contingent and not really 'your' power.
I could almost certainly do essentially nil to upend a car alone, but a dozen or so of my friends cooperating at my direction could roll a car like a powerful tornado. Yet that depends on being able to communicate, schedule a meet up, motivate everyone, not having inclement weather, etc. etc. etc.
In short it's flimsy and unreliable.
On top of that I'd only ever really have my own power under my control, not the power of a dozen people. They all remain firmly at the helm of their own personal wattage, able to withdraw or deploy it in this pursuit or any other at a whim.
In terms of focusing and multiplying material power, tools alone are much more effective and reliable than immaterial power alone.