Well of course I can't debate that people will find G10 more aesthetically pleasing all the time, but I'll be I could show that it's far, far, far, far more probable that someone will like a G10 knife (the feel, the look, etc) to an FRN knife. I'd say something like 10,000 to 1 odds. I'm sure some people think polyester shirts are the greatest, I'll just stick to my cashmere.
Again, I can't hope to prove that all people will feel that G10 stays more temp neutral than FRN, but I'll bet I could actually show that the temperature of G10 changes significantly less than FRN.
FRN can be sort of grippy (you mention the griptillian, which...isn't really grippy at all), like the D`allara or Native III....but in its grippiest form, it's a lot less grippy than Spyderco's G10, much less Strider or some Kershaw G10.
It seems like your complaint is that we are claiming that G10 is subjectively better to us instead of appealing to some objective authority. But subjectivity is important. I don't imagine you'll have much luck convincing people that don't mind spending the money on a G10 knife to go back to FRN. FRN is for cheap kninves.
Of course, you might actually be demanding the impossible and asking me to explain why I find something more aesthetically pleasing than something else. Why blue instead of red? Well, okay, I can't give you that answer, so I suppose if that's your criteria that's needed to qualify textured FRN as better than high end materials, then you'd win, but I don't see how that would follow...
It seems like ergonomics are intrinsically a subjective thing...I'm not sure how we're going to escape that...
You further list all the attempts at objective reasoning in a mocking way, as if the reasons should just be invalidated prima facie. But maybe some of us don't want our knives to be scratches up from the occasional fall and we're willing to pay for it (among the other reasons).
The attacks on metal handles are a little more obvious...but what metal are you talking about? You might try switching to titanium, which isn't nearly so temperature sensitive, if it really bothers you that much. And what for textured titanium (like the blue bump) or even textured SS?
What about SS with grip inserts like the Kershaw storm?
I mean, claiming that all metal handles are safe queens (if used in any cold area) out right seems like a hasty generalization.
And since when are high end material handles associated with smoothness whereas FRN is not? There are tons of grippy (the vast, vast majority, I feel) of high end handle material knives in the world, probably in far greater excess than their FRN counterparts (I again note that the grip series is not particularly grippy, despite its namesake), including the lovely but smooth Spyderco Centofante.
The core claim is simply false. No, textured FRN is not a realistic competitor to G10 or some other "high end materials." If you made an FRN Military and sold it next to the CF one for the same price, no one would buy it, period.
FRN is a wonderful material, but it has its place, and it's just not next to the G10/CF/Ti knives.
Like just about everyone else my age, I started with FRN knives....but I don't own a single one anymore. The D`allara DP (excellent knife, btw) in some recent photographs I gave away as a gift to my cousin, which might confuse some folks as to the validity of that statement.