I suppose it’s all relative- they do have excellent cornering grip when ridden harder and driven into the trail more, but the tradeoff is that they don’t do quite as well when ridden with less commitment
It depends what you want from a tyre- if you’re convinced you always ride hard then it’s fine, but sometimes I ride slower and it’s pretty uninspiring if they let go in an easy corner ridden slowly- even though I know they’ll grip in the same corner ridden hard, once it happens a few times it can get hard to trust them.
Sorta like the difference between a round tyre, like an old Sportec and a pointier one like a Pilot Power- the PP might well grip better when it’s at the extremes but the Metzeler will work better on the way there- and if it’s hard to get to the extremes then who cares how well they work once you’re there? 😉