But here’s a different viewpoint for the priest: He is the shepherd of the total flock of the parish. That means he is considering all the people and how this could help grow all people in faith. I know the internal struggles of some priests in my own area. It’s not (always) that they want to impose their own taste to others.
The priest probably knows that if someone is receiving kneeling in a ceremony where the focus is exactly on receiving the Eucharist, this will create questions. Like other parents thinking “Am I less holy than this other parent because I let my child stand?”, “Why is this boy so hypocrite?”. While the devout catholic like in the OP will understand that for this instance, it’s better to receive standing, the parent that is unfamiliar with liturgy will not understand. And this moment often is the only moment for a priest to evangelize and to reach less practicant people. So making the “receiving Communion”-part more complex than it already is, if that could hinder these people’s access and understanding of the Eucharist, doesn’t work.
Of course, and this is a real problem I see around me, the priest SHOULD make sure the communicants still receive reverently.