It's 2020 and TSMuxer still cannot work with DolbyTrueHD?

I guess it shouldn't make a difference to me, since I play my remuxes through my Blu ray player and TV speakers, but still.

Why is this a thing?

The only way for my Blu ray player to accept subs and audio as it is in the BD is to read the m2ts. But I found out if you turn a .mkv into a AVCHD, my BD player will play it like a Blu ray title and have chapters, display language, etc..