Standard AR sights are high off the bore because the stock is in line and forces the bore lower.
The AR PISTOL isn't necessarily held that low - it implies you WANT to, when you aren't going to necessarily shoulder it anyway. Why hold the gun low and then tilt your head down to the buffer tube when you can hold the gun UP to your sight line?
Those will be decent sights for a PISTOL.
Some just need to think it thru. The Pistol is a 2MOA rifle cartridge gun being used at less than 80 yards aimed at an 18MOA target - at least the way I do it hunting deer.
YMMV. Aiming it at humans doesn't change anything, same MOA and usually even closer. Get the gun up to the sight line where your eyes can see it rather than forcing yourself down into a less natural and more uncomfortable position? Nobody tries to hold a handgun down that far, but the notion there's a buffer tube that can be used is where the problem starts.