Yep, there are quite a few people who believe that, and what I can't understand is why they won't just play 4e instead.
There are a number of issues that impair me from doing so, which tends to make such efforts pretty pointless.
(1) I can't find people in my area who want to play it. I prefer playing face-to-face. Here in Vienna, my D&D choices were limited to people running/playing either 5e (generally players age <25) or OSR and B/X (mostly players age 50+). I will be moving to Hamburg in less than a month, so things may change, but I'm not terribly optimistic about my prospects.
(2) I don't have hard copies of my books anymore,* which makes it difficult to share with a group. I do have some pdfs. However, I think that 4e D&D first needs an OSE-style revision and clean-up to hammer out the bugs. It's a bit too much work for me otherwise because I am out of practice with doing that sort of live maintenance work. My time with 4e was almost entirely as a player.
* Moving overseas involves a lot of cutting back.
(3) Also, believe it or not, but I don't necessarily want to play 4e D&D. There is a lot of great innovative game design in 4e, but I also think that the hobby has come a long way since then in terms of design.
I still wish that 5e D&D didn't throw out so many babies with the bathwater when it came to those design innovations made by 4e, because I see so many 5e DMs and groups online reinventing the wheel. I would still like to see D&D return to some of those innovative 4e elements in the future, but I'm also not holding my breath. I think that my ideal D&D probably game sits in a weird nebulous cloud between 4e, D&D 5e, Pathfinder 2, and Shadow of the Weird Wizard (all set in the Nentir Vale World Axis mythos, of course

) but that took a few design and advice cues from some indie games.
(4) Finally, it must be acknowledged that there are some other games out there that scratch a
similar but not identical itch (e.g., Lancer/Icon, Beacon, Fabula Ultima, Shadow of the Weird Wizard, Stonetop, etc.). But finding groups for these games also come with their own problems.