Those look like narrow cuts to tune the PA to the room. It’s perfectly normal and required to stop feedback and acoustic problems in the room. You shouldn’t need to do anything just trust the sound guy.
Exactly. My first thought looking at those bands was that the engineer was trying to notch out resonant frequencies with floor, walls, etc... At some point you need to trust that the sound guy knows his room better than you do. That's not ALWAYS the case, but, in general, I think it happens more often than not. If you use a wireless setup, I'd walk around out where the crowd will be during soundcheck to try to get a sense of what your overall audio experience is through the house sound system. Ideally, you'd have someone messing around with your Kemper's EQ while you give them the thumbs up or down. Sometimes just a subtle adjustment with a parametric EQ can make all the difference in avoiding nasty resonances and attaining a better "cut through the mix" tone for a specific instrument. If you can't personally walk out there, yourself, have another band member (like the drummer) walk out there and listen critically while you and the bassist and keyboardist/horns/whatever instruments share your guitar's bandwidth, , play. That assumes your drummer can tell good sound from a hole in the ground. 
Hope that helps. There's a whole lot of science in audio, but sometimes it requires a bit of a artistic touch to paint the soundscape that you are looking for, particularly if your venue changes on a nightly basis.
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