It isnt just how Markdown works either, its how HTML works too: Text is grouped in paragraphs there too, not in lines or statements. Of course there is options to force a line break for when its necessary. But most text reads better as paragraphs. And most people overuse manual line breaks.
What should they do about it if it actually runs great on their systems though?
A lot of games only play well if you take some time figuring out a certain combination of graphics settings for your own computer. Then there is bugs and stutters that really is only happening with certain settings. Particularly these days with the four common upscaling models, you never know which games are best optimized for which model, but none of them are optimized for running without upscaling.
So for a regular reviewer to really give a game a fair score, should they run at the default settings? Would be unfair to expect them to know how every weird setting impacts the game. Should they try the game at 4+ different systems to make sure there are no performance issues and stutters dragging it down in certain cases? Leaving performance testing to dedicated performance reviewers and just focus on reviewing the game itself might be the best option.