I have never understood the argument for why receiving in the hand is supposedly disrespectful or irreverent.
It’s not disrespectful. It’s really the theological principle of lex orandi lex credendi which leads people to disagree with communion in the hand. They also disagree with it because one of the reasons it was approved is because too many people were sinning by doing it without permission. So it was approved so the bishops, priests and lay faithful who were already doing it would no longer be sinning.
The reason the church adopted communion on the tongue was to limit the number of tiny particles. Placing the Host directly on the Tongue prevents the communicate from having particles of our Lord on their palm.
This is also why in the Latin mass, once the priest touches the consecrated Host with his index fingers and thumbs, he must keep them pressed together at all times.
Even when he lifts the Precious Blood, he is doing so really with just 6 fingers, as his index fingers & thumbs are pressed together to prevent any tiny particles from falling.
When the priest turns the pages of the Missal, he must do so with his middle, ring and pinky fingers only, as he can’t use his index fingers and thumbs. And when he prays with the Orans posture, his hands almost look like he’s holding up two OK signs.
So for the people who don’t like communion in the hand, that’s why.
God Bless