Modern, knob based, vehicle climate control systems actually bury a lot of functionality. For example Toyota's "automatic" AC you can either pick between fully automatic or a subset of manual controls. That's because they ran out of space/complexity headroom for more controls.
Touch screen climate control integrates better with voice (which you should be using while driving), offers better fine-grain control, more information (like CURRENT interior temp rather than just outside/target temp), and can offer new functionality (like profiles/pre-sets, additional automatic modes, memory climate, linked seat heat & cool/positional vents, etc).
I dislike several touch screen based climate control systems I've used. But that's because they're BAD. Car manufacturers are bad at making touch screen systems. But let's not throw the baby out with the bathwater. There's a lot of good reasons to go that direction, car manufacturers just need to work on UX a lot.