I'm starting to realize how Gerard feels (or any such celebrity). But he explicitly says how he'd love to respond to everything, but it's just physically impossible. (by no means am I here comparing myself to Gerard, but just saying that I can understand it.)
The fact is that the older you get, the less time you probably get to spend on sites like this...unless it's your job or something. And if you're anything like me, you'll end up writing a whole paragraph, then doubt whether you should edit or not, sometimes even re-write it, and by then, you've spent like 10minutes on one comment! :p