Basically, yeah
I think most of us would answer the same XD
I'd never accuse another creator of being desperate for replying to their comments, but I will admit I do worry about coming across as desperate for responding to mine, especially if it's obvious I didn't really have anything to say.
I generally only reply if I have something to say; I don't like forcing myself to come up with stuff because it'll end up sounding forced and if my readers are anything like me, they might think "oh, this person really values comments so much that they'll put in the effort to reply even when they clearly don't have anything to say, so as someone who likes their work I now feel like a bad person for not being a supportive fan and commenting on their episodes"
That, and I'm worried if I accidentally miss someone they'll think I hate them or got offended by their comment because I replied to everyone but them :'D
As a reader, my comments are basically graffiti; it's my impulse to 'mark' interesting (digital) territories with a sign of my presence
It's something I do for posterity, regardless of whether or not other people respond to it, so there's no need to feel any more obliged to reply to my comment than to reply to a carving on a tree that says 'TheLemmaLlama wuz here' XD
Huh o_o I can't relate to the urge to do that :o