It's not. It's laziness (you can punch-in record over a bad note or line so the pitch correction doesn't have to work as hard...) and incompetence, and I suppose that incompetence could translate into an objectively shitty choice to overuse pitch correction in a poor way and have it work too much and all the time, and multiple vocal tracks demand that you're not off pitch, so that's a reason for pitch correction harder too, but it's better to not rely on layered vocals if you can't sing in pitch well enough to handle it - So it's a choice in that regard. Blaze doesn't go to a vocal studio and pays to record his takes. He records his takes at home, just like a bunch of other guys do. If you purchase a vocal take from Ripper Owens or Ralph Scheepers, that record from their home studios, you get a stem track with effects and processing. They do it from their homes, just like Blaze does, but they deliver takes that aren't crazy pitch corrected (that being said, both are objectively more proficient singers, but that's beside the case). Blaze didn't overuse it until War Within Me. It was perfectly ok during the Black trilogy.
Edit: Look, I really want to puchase everything Blaze puts out, because I really like his solo career, but he's making it very hard lately. I skipped out on War Within Me, I bought his last live album, but I haven't decided if I'm going to give him my money for this product. We'll see. I'm delighted to see him on tour again though, it has been far too long (2nd or 3rd William Black album).