Not necessarily. There are still people who only solely put out long form content and are doing pretty well. Rash Nemain recently put out his Judy animation well after 1.5 yrs following his previous animation and people still love the guy, even I love his content too. And that's because he has stayed consistent. Even if he took like a 1 month break very rarely, he still posted WIPS and progress, which was slow but as I said, consistent. Also Dezmall is still literally one of the most popular animators lol??
PDB on the other hand, less said the better lmao. This guy did 1 update, disappeared for months and then does another. And slowly he did finish the animation after like 2+ yrs but then decides it needs "rework" and started from scratch again, but staying the same with his inconsistent schedule. I have legit seen nobody artists like fatcat17 turn from making 10 sec loops to the pro that he is now. That's how long he took lol. This duration is just too long for anything, esp when you know how inconsistent he has been. I thought he was gonna be the "Dezmall killer" back then, now I know dezmall doesnt need to worry abt shit XD