Actually high aspect wings have been quite common for years in kitesurfing if you are after speed. At the top end you have the Mikes Lab and Chubanga racing foils and there are quite a few more affordable high aspect fast foils from companies like Moses/SABfoil. There are more choices in smaller high aspect wings from the various foil manufacturers now as they chase every niche of foiling and size of foiler. Many of these smaller HA foils will suit kitefoilers and there are some that are very similar to racy kitefoils as the niche of high wind, high speed wing foiling becomes a thing.
However kitefoiling has some unique characteristics which make certain foil types more suited. For a start wingfoilers are limited to a wing size of around 7m to 8m, you can go up to 23m with a kite. Not that you need to as even a small kite such as a Peak4 5m will be fun in 10knots plus with a good 1000 sq cm surf foil. Also twin skin foil kites are very efficient, low drag and can generate a lot of power, speed and point much higher than inflatable wing foils.
And with kites you can generate a lot of power relatively effortlessly over a long period of time just by actively flying them. You also get to use a higher less disturbed air column which also gives more power so you don't need a HA foil with very low drag characteristics to keep yourself going. If anything, if you have a HA low drag foil, your kite may accelerate you easily beyond your skill level. Compare that with a wingfoil which requires pumping to get onto the foil and retain speed in lulls.
And boards for kitesurfing are just a platform and can be as small as your stance will allow and weight 2kg or less. Even a small prone foil board is larger and they need a wave or tow to get foiling. And with a wing foil board it becomes very bulky compared to a kitefoil board. Having a small board with no real swing weight means manoeuvrability is fantastic and more surfy medium aspect foils suit this.
One more thing. New foils, new wings and new boards can be a fantastic marketing opportunity to the bored masses who want the latest new products after they quickly got bored with last years new products. Do your research and make sure the new thing is actually better and not just better marketing