There is absolutely some muscle loss when on hrt. A study suggests transfems are comparable to cis women after about 2 years on hormones. Dunno if transfems have an easier time having visible abs, though.
https://bjsm.bmj.com/content/55/11/577.full?ijkey=yjlCzZVZFRDZzHz&keytype=ref
I would recommend checking out this website: https://genderdysphoria.fyi/ It has helped a lot of trans people understand themselves, and would probably help you understand trans people as well :)
EDIT: This game let's you walk around and see some common terms and stuff: https://purplesloth.itch.io/whats-your-gender
Yes, but distance is still continuous, a minimum measurable distance (between stuff) doesn't make space granular. I suppose there might be a minimum measurably meaningful number of configurations, but I'm not super convinced.
Whether or not an infinite number of particles will fit or not is not important, no ? I'm not sure what you mean by finite granularity. There is no "grid", space is continuous, the planck length and the fact that push on each other doesn't really factor in. By virtue of space being continuous and particles being finite, means you can configure stuff in infinite ways.
Edit: Not quoting you with the reference to a grid. I know that's not what you mean.
There are an infinite number of numbers between 0 and 1, and yet there is no repetition. Pi and other irrational numbers are infinite yet non-repeating. I wish I knew the name for this kind of thing because I'm sure it's been discussed in philosophy (a kind of opposite, eternal recurrence, has been discussed a lot).
I don't think anyone knows enough about the universe to say whether or not there is infinite variety in macroscopic stuff, so I don't think anything can be ruled out.
There are infinities without repetition. Usually the proofs for the stuff you describe assumes finite possibilities.
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