I know many Catholic Christians who believe it is irreverent to receive the Holy Eucharist in the hand.
Is it a doctrine? No. Was it for the longest time (most of Church History) a Discipline? Yes.
Though Disciplines can change and Doctrines cannot, it does not mean that changing the Discipline was good.
I take research polls with a grain of reality, because so many non-Practicing Catholics refer to themselves as “Catholic” in polls, but some polls show that an overwhelming percentage of Catholic Christians do not believe in The Eucharist is the body and blood of Jesus, let alone revere Him in the Blessed Sacrament!
I am not saying that those (myself included) who receive in the hand are less believing. I believe full-heartedly that the Eucharist is true! And that Jesus is truly present! And someone could receive on the tongue and not believe.
I am of the opinion that we should bring back an altar rail and restore the Discipline of kneeling while receiving. Whether in the hands or or on the tongue, I’m not really that concerned about. I am focused on Jesus, not on how others are receiving our Lord.