Sample settings are just a starting point. We all have different taste, different gear. Vintage example: way way back in the day, I noted the EQ settings used by a talented local bassist on his 70's SVT 8x10 stack. I dialed up those same settings on my own 70's SVT 8x10 stack, but hated the result. We both played passive Fender P-basses strung with rounds, both fingerstyle. It was just bizarre. He got killer tone with his rig, and I could get my own killer tone through my rig, but with very different settings... and my killer tone was not the same as his.
Even regarding solid state devices, I don't often get the result I expect when using sample settings from a manual. That's because one person's passive P-bass will behave differently than another's active Stingray. And one person might have a modern-sounding tweetered speaker cab, while another might have a vintage sounding cab, and another might be running direct to a DAW without speaker simulator.
Also: as you see in posts above, there's a difference of opinion on the Blend control. Some swear by 100% wet, while others are equally committed to blending in some dry.
So again: use the sample settings as a starting point. If you think there's too much presence and not enough low end, then adjust to taste.