In a word, skill.
That's pros. We're amateurs. Some will develop excellent skills, some won't. And a good power tool *might* help the unskilled. A poor power tool
*might* be able to be compensated for with skill. But a poor power tool and poor skills?My skills are so so. But some time ago, I made a record player plinth out of veneered chipboard, and got the use of a pro workshop. Where there was a De Walt 3 phase radial arm saw. Lock it to 45 degrees either way and you got a *perfect* mitre. Lock it to 90, and a perfect right angle. All without much skill. And no chipping of the veneer.
My 150 quid PPPro just isn't in the same class.