They haven't had the option until now so that's trivially true. This is among the first times this tech has been put into a hand-held knife. Until now it's been limited to industrial food processing where you're cutting something sticky. Turns out you can prevent sticking just by vibrating the blade at a few khz. No chemical coatings required.

I don't expect wide adoption among chefs and this won't at any point replace a substantial proportion of normal knives. And this implementation of the tech is silly and bears all the flaws of modern product design. But it is cool tech.