I don’t do it regularly, just when I start looking like a monkey, but here’s what I do. If I just want to do it quickly I use the trimmer, maybe with a longer setting, because it pinches. Otherwise I use a regular razor, like the Gillette ones and a bit of patience, it’s surprisingly easy not to cut yourself. Sometimes I use depilatory cream, but be careful, if you put too much or leave it on too long it will burn for a few days.
But saints are not gods, they are more like emissaries. You pray for them to bring your word to God.
But in the end, religious beliefs don’t make sense anyway, so why bother analyzing contradictions. Faith is based on believing without needing proof, so any logic reasoning against religion fails against that statement.