In summary, I think that if there is a medical basis for excluding somebody from military service, that should be possible under existing law without issuing blanket bans.
I understand it was under existing law until Obama decided to be woke about it.
It's like the Dreamer thing. It's not a new law, it's rolling back exceptions Obama made.
People forget Obama deported more than any other president and he put migrant children in cages. If you're against this you have to acknowledge it's not just a Trump thing. I'd argue you also have to acknowledge that a significant percentage of these children are accompanied by adults unrelated to them and there are complex safeguarding needs that become apparent when a crossing is intercepted by border officers. It's much easier to just say "OMG the orange one is a Nazi".
Political conversation has become so wildly partisan that facts are being deliberately omitted.
If the US had a better healthcare system the issue of trans people serving wouldn't be so fraught. But because healthcare (and tertiary education) are tied up with military service for so many, it becomes a much more emotional argument.