There are many, many reasons that modern cars seem to be driving away from physical buttons as fast as they can. Automakers are eager to cut costs, especially in the electric era, and they can't cram every new advanced software feature into a button. But there's a less-cited reason why buttons aren't in vogue in some markets: buyers of China's EVs consider them "old-fashioned."
That's not true across the board, of course; every driver is different. But as a broad trend, Chinese buyers—who are used to some pretty cutting-edge tech—feel like buttons in cars are something from their parents' era.