Re:Let's build an MP3-decoder (2008)
by KMag on Friday March 16, 2018 @07:20AM
(#16599895)
aepiepaey agrees with you that it's an intentional design decision ("thought ... was a good idea"), and his/her use of past tense also implies that s/he disagrees with the decision.
...except if you want to batch convert real-world markdown.
Though admittedly, that's mostly because markdown designers thought allowing embedding of arbitrary HTML was a good idea.
(The best you can get is by going: markdown -> HTML -> $target_markup.)