I very much dislike scenes like the one below, where former President Trump is surrounded by preachers.
Are you certain you are not making some assumptions about this? You don't really know the motivation here. It could be for show but it could also be genuine.
I can attest to the power of prayer and laying on of hands in this way. I have been part of a local Men's gospel choir made of of about 40-50 local farmers, businessmen, and family men. We gathered once a month to sing songs and give glory to God. Eleven years ago, our director/organizer was diagnosed with brain cancer. The tumor was the size of a baseball and his prognosis was four to six weeks. The next time we got together and he told us about it, we all gathered around him, laid hands on him, and prayed for courage, strength, and healing for him. Over the course of the next several months and to the surprise of his doctors his tumor began to shrink and he eventually went into submission. He used this situation as an opportunity to share the gospel with others and we were granted 10 more years of his presence with us. About two years ago, a second tumor began to develop and they tried some kind of laser surgery. The result of that surgery left him paralyzed on his left side but that didn't seem to hinder his sharing of the gospel. He passed a month ago but he left a legacy of caring and love.