First bike I've bought which didn't have a centrestand. Pennypinching and weight-saving by Kawasaki to meet the market. In 2019 Kawasaki Australia gave $500 cashback after purchase on RS's. Strangely, the dealer gave me a good price on the bike and didn't even mention the cashback. Radguard was part of the dealer deal, so the $500 went towards centre stand, ($295Aust) , fender extender, 16 tooth front sprocket, and small instrument screen. All worthwhile bits which should have been in the design of the bike originally.
In my case, the centre stand is vital for chain maintenance, cleaning, future wheel removal etc- the things we these days use other manner of stands for. My puny 70 year old 70 kg mass couldnt lift the rear end of the RS onto a paddock stand. The centre stand is easy - nearly as easy as my Ducati 900SS, which only has a centre stand and a lot easier than my Suzuki GS1100 G .It's shaft drive so I rarely use it, but am still glad to have it.
So go for it. The hardest part of the installation was getting the rubber bung through the hole in the bracket. You won't notice the weight, as others have said, and only a pretty aggressive or very heavy rider will be worried by grounding the longer hero knobs supplied. It is a bit more visible than on older cradle framed pre cat-converter bikes, but not really an issue. Quality of the genuine Kawasaki stand is up to that of the rest of the bike- very good. Biggest problem was lack of availability in Australia- had to wait about 6 weeks for the ship from Japan.