There are many things the priest does in the liturgy that are also done by the people–folded hands, sign of the cross, beating of breast, etc. When it is something that is specific to only the priest, there are documents spelling that out. It is clear that at Mass only the priest (or deacon) can do the gospel and homily, or the blessings, or the consecration, etc, etc.
Show me something that says it is NOT ok (that isn’t just someone’s opinion), after all of the many, many complaints and letters.
The fact that it is encouraged or mandated in some dioceses says it CANNOT be forbidden or it could not be so encouraged or mandated.
As you yourself have said on many occasions, and we have all acknowledged, it is up to the Bishop with jurisdiction. That in and of itself should make it a non-issue. It’s not our decision to make. Our decision is whether we act charitably toward each other, whatever sign of devotion we might choose.
Peace,