No, it was primarily about non-cis in cis. This whole post isn’t about trans people. Whether that be <insert any non-cis thing here> or whatever, it only occurs because of a) mistake or b) devious action. The point of that comment was raising how those that call it out are ridiculed instead.
As I said, this applies to anything; age, gender, backstory, images, etc. You specifically focusing on trans people makes no difference in whether it is less wrong. That is just the theme of the same behaviour, pick whatever theme you want, that is not the point and it shouldn’t be glossed over, “Oh, it’s fine for this group but not others.”