WOW. "Who really gives a **** about T-Bar form?" Do you care about your form for any exercise?
Let me ask one simple question sunshine - if I am benching with a barbell, and I start the rep, and on the eccentric phase of the movement, stop at a bend of 90 degrees (elbow aligned with shoulder). Am I working my muscle to it's full potential? I will help you out - no you are not. So what happens to the fibres that aren't getting fired up and used? They become isolated and stay the same density, whilst the other portions of the chest get more dense. Thus, creating an imbalance - leading to injury, which could, god forbid - lead to a serious accident because the muscles aren't balanced and there is a lack of stability within the core structure. So when you decide to use proper form, BAM, pulled muscles, torn muscles, damaged muscles due to lack of a balance, because of range of motion. So, this is why we give a **** about proper form and using the muscle in a proper range of motion. I.e (Rows), stretching the lats, rhomboids, trapezius out, and using their muscle fibres to pull them back in, tightening them up - getting stronger. You are selling yourself out if you can't be arsed to train properly.
The main point - working the muscles to their full capacity through a long range of motion?
If someone "cheats" with one exercise - they do it with all. You can't have "ass to the grass" squats if you are close to being upright when you're rowing.
From your opening line - it is likely you don't actually understand the body's anatomy and the way a muscle is worked? Thats cool. Just ask.
Or, go on youtube and watch Athlean-X for some science in your training.
http://breakingmuscle.com/strength-conditioning/does-range-of-motion-matter-when-building-strength - this article explains that there a benefits of partial reps - but tells you how you are selling yourself short in the end.
Leave your ego at the door - it isn't about how much you lift, if your lifts are ****.
-walks away, shaking his head at the mere stupidity of the opening line.