A lot of them (under Lezhin) do have the English version (of course I do agree with you on the whole uploading at the same time thing. I've had that issue as well). However the argument on Twitter was that people wanted to translate it to other languages (more specifically spanish). Not only did they come off as super rude about it, they did disregard the artist entirely (which was an embarrassment). So no while I did agree with you on that part ^ it won't solve the issue at all.
*Not everyone knows English
This webtoon is licensed in English with Lezhin, currently on chapter 12.
The author is furious on Twitter about illegal uploading.