Actually, it makes a lot of sense. Guys that would buy a hyper streetfighter are likely the type that care much more about top end HP. Consider the competition in this category: Super Duke 1290, TuonoV4 1100, Ducati Streetfighter V4, etc.
The SX SE is a hypersport tourer. I never did need all the HP that the ZX14R has when I rode mine. Frankly, it could have similar "detuned" top end like the chart for H2 SX SE in this video, and I wouldn't miss it much. I've always believe that Kawi should've done a ZX14 SX, a dedicated sport touring version. Detuned the HP, relax the rider ergos, better wind protection, etc. But I understand Kawi probably committed to the H2 platform many years ago already, so no incentive to spend R&D money on expanding a line, whose days are numbered. Supercharging a 998cc engine makes more sense with ever tightening emissions standards like Euro 4/5. And it is more "tunable" than normally aspirated big block.
'18 Ninja 1000, '18 Street Triple R, '18 KLX250S, '15 250XCF-W, '14 K1600GT, '05 GSXR600 (track)