I don't think I could keep up with the schedule. I heard some of the mangakas hire a bunch of assistants but I would feel bad forcing other people to keep the the strict deadline.
It's also the 2020s, less people are reading print. If you are from outside of Japan, it's not really worth trying to get into the magazine. I think otakus might see it as a way of getting clout but not all series make is big in Japan, let alone the rest of the world. I found Pyu to Fuku! Jaguar on some manga scan sites and loved it. Never got an international release. It got a movie but no anime (except for those weird Flash animated DVD extras). It has mostly just popped up as a cameo for the Jump line up.