I think that the fact that women can't go topless by law, period, end of statement, is just unfair.
But more than that, women couldn't go topless by social convention, they'd get seriously messed with most of the time. Also unfair.
It's not like moobies are any less jiggly, right? Yet men, no matter their physique, are going to show us their nerples when it's hot.
I live where it gets very, very hot. Wearing nothing but industrial sunblock from the waist up might be really convenient.
That having been said...nobody
really wants to see what's left over when a middle-aged person loses over 100 pounds. Really you don't. I'm not showing it off, nope, not even in a sports bra-which would be totally legal (since I'm legally female-and third gender isn't a legal option now, is it?

). Not even mowing the yard in 100 degrees Fahrenheit(which is like 38c?)
There's enough flappy business hanging out of the tank top I do wear.

One of the fun things about being mtf, my wife tells me, is that you get to experience all the BS parts stuck on to being a girl for the first time as an adult. It makes the BS sooo much more obvious, or to paraphrase her:" It's like I lost ten IQ points when I started taking estrogen and wearing a dress."
(Sorry for rambling)