Agreed that its not a big deal but I will say it was a big deal to me personally when I hit that mark a few years ago, and after the next update when I go down to the 980's I will be slightly sad but I feel like I accomplished something that 99.9% of disc golfers never will.
"Big Deal" is relative. Relative to how big a deal it was years ago, 1000 rating currently is less of a big deal, because it "only" puts you into the ranks of "competent touring pro". So, relative to touring pros, 1000 rating is NBD. But relative to 99.99% of the rest of the disc golfers out there, it's definitely a big deal.
Frequently, I think these conversations come down to whether one ascribes to the "2nd place is first loser" mentality. If that's the mindset, then any accomplishments other than winning, and winning consistently, at the top level, are "no big deal". But otherwise, it's just a matter of perspective.