If you find reading other people's comments fulfilling (either on your own site or on sites that you visit), that's awesome.
I tend not to read comments on any site that has them. I consider sites like HN which exist solely for comments an exception. If I had a blog, I certainly wouldn't let other people comment on it. I suppose this means there's a chance I might miss out on some really enlightening comment that someone makes. Based on ~20 years of reading comments on the internet, I'm willing to take that chance.
It might just be my innate negative reaction to someone telling people what to do, but listening to someone make bullshit blanket statements about how you should spend your time pisses me off (although at least he said "please").