I agree with you about male-bodied children who are more physically feminine. For one thing, there are many physically feminine men who are not transsexual. But a transsexual girl/woman with a feminine body is indeed fortunate.
Someone left a comment that the writer subsequently deleted. I get comments in email, and I thought the writer made a good point. So I shall add
as long as she survives childhood.
Being feminine-looking is indeed an advantage when it comes time to change sex, but first the girl has to make it through the taunts, bullying, and even beatings that are likely to come her way.
As someone who was not as feminine-looking as some but nonetheless endured her share of trouble and pain for not looking or acting like people thought she ought to, I should have remembered to qualify my statement.