Thing is that as a beginner, you have so many things your trying to do to get the movement down.
But the more you practice, the less you have to think about those things until it's second nature which allows you to focus more on the technique.
There's also the increases awareness of one's body in space which allows a more advanced lifter to use some more body english to more effectively achieve the desired results. Which again, just takes lots of practice.
Let's take db rows vs Kroc rows. The db row is the one done with textbook form. Bringing the dumbbell in with a neutral grip in an arc to the hip with a squeeze at the top and a stretch at the bottom.
But with the Kroc row, you just try to move the weight to your lower ribs with your lats and back. If you're lats and upper back get torched, you know you did it right even if form wasn't textbook.
I wouldn't recommend beginners use Kroc rows because they're not going to have the mind-muscle connection or awareness of their body in space to get the results.