If your not going to race, a 30lb mtb is fine.
I bought my bike with the same attitude.
Then I raced it.
My idea of an adequate bike for racing has worked its way down to a bike that has everything working. By the end of the race, that can be a surprisingly high bar.
OP, don't worry about weight. Test-ride the bike, and buy it if you like it. Note that if you ride it a lot, you'll wear out some parts fairly quickly and a lot of the stock parts on the Hardrock are "disposable" - either you can't maintain them or they're not worth maintaining. So if you can afford to go up a trim line, the components will give you a better service life. From a quick look at the spec, it doesn't look like Specialized is guilty of some of the more egregious component selections that sometimes show up at that pricepoint, though.
For me, the Hardrock has been an excellent choice. It was the bike I could afford when I wanted to have a mountain bike again, after some time away from the sport, and over the last few seasons, I've messed around with the spec. to the point that now I can go racing or for a long ride and just ride the bike from start to finish, without having to think about it. So on the one hand, I've certainly spent more than I would have if I just started with a more expensive bike, but on the other hand, I've been mountain biking for the last few seasons, not saving money and talking about how cool my bike will be.