You mean like bold, italics and different font sizes? We tried that and it made the whole reading experience much more cumbersome. What we might do is allow inline graphics attachments. The problem with those are DMCA takedowns...
We suggest linking to those examples, normally they are too long to fit nicely in. The same goes for graphics. We are afraid, exactly for the reason you specify, reading experience. Agreed we could do it in comments, will forward this.
It is waiting for the debate creator and their admins to accept or respond to. The suggestion is used as good faith and coherent writing ability signaling.
I don't want to know what e.g. the gun legislation debate would otherwise look like. It meanwhile has 2.4k unique claims and 5x that in comments. (https://www.kialo.com/3346)