I watched after a cousin of mine insisted I shouldn't be trans because of what happened to Brandon. It made me curious to put it lightly, I had read about the case some before watching it though, so I knew what I was getting into. I was also pre T, it actually slightly scared me, but not enough to consider changing my mind.
A cis female actor did not bother me, he was pre everything, he like I do now still (first month on t) could pass as female. A trans man actor (which were rare at the time, and most were likely not out) wouldn't have been able to play someone pre t.