I'm saying it depends on your viewpoint.
From my perspective, it's far from benign - it's pretty much essential.
Today, what with it not being ad1206, people have choice in what they do. There's a reason I choose to do 3-6 tkd classes per week, but only 1-3 kickboxing ones - and to take it further, zero lessons per week in boxing/MMA/BJJ/km/other, which are all within striking distance...
If it was all about "dem fite skillz innit bruv" then I'd probably be doing something else. I refuse to believe that of the millions of MAists around the world that I'm entirely unique, so others must be the same.
How many of those good kyokoshin fighters would have stuck with the training if there was no kata involved? I mean, it's highly likely they could have just done MMA instead for no greater inconvenience or cost...
I'm at best a mediocre fighter, but I'm far better than if I'd done no training.
Therefore, kata (or whatever term you use) makes some people better fighters.
(Caveat that kata to the exclusion of all else is no better from a fight perspective than tennis. But also the adverts of "secret moves to end any fight in 3-5 seconds" are probably even worse, even though they concentrate on fight and exclude kata.)