At least as far as we know, AI will require power and space into the future. If having a bunch of fervent humans worship it allows it to have more power and space then it's a reasonable course of action to have groups do so. In addition this allows the AI to remove heretics that would shutdown said AI without having to expend the energy to do it itself.

Omni: "tetraca does not accept my loving embrace, and calls for your god to be destroyed, will you stand for this heresy!"