I think trans people should be allowed in Men's competitions because genetically men have more power than women. If they compete against women that would cause inequality. But if they compete against men nobody object it.
While I'm conflicted on the new rules, I don't think letting Female to Male TG people automatically compete is a good thing either. Women are more flexible by nature, so somebody that has been trained and just started testosterone before the competition (or never possibly by the sound of it) would have an advantage in some competitions.