Because I didn't want a gallery in the first place. I made the account on an impulse, and regretted it ever since. I knew that since my work was initially circulated on here and infinitychan, access to it would not be an issue because people would have it saved and post it, or since I'm constantly lurking these threads, I could post it.
Having a self-made gallery felt like an obligation more than anything, and the more attention a gallery gets, the more I feel like I have to do more for it. I also never wanted to associate a name with my work, since it's something that one can latch onto and invest too much thought into. It feels very binding.
The first clearing of the gallery was just a result of all this- I didn't want one, I knew people could access the work if they wanted to through other means, and I couldn't get over the feeling that I had to produce content for it. And because I alter my artstyle to produce work as "Sorry," it becomes a hassle to sit down and make it. Because of that, I flat-out didn't enjoy making it as much. The second and final nuke was me giving into that feeling of obligation to put something up.
Not the greatest of reasons, but that's pretty much what happened. I feel a lot better now that I don't have that gallery, and can just do more hands-on fun stuff in threads.