Because the E cores don't do anything for a huge majority of workloads. Anything single threaded will never use them, and if you're interested in multi-core performance, why are you even looking at Intel?

All they do is suck power and take up space that could have been another full core or two, except Intel can't add another full core because the chip will burn up, so they're literally asking us to pay for their incompetence.

It's like buying a new motorcycle, except it comes with a free push lawnmower. Yeah, okay, a free lawnmower is kind of neat I guess, there's a use for it, but the price is definitely baked into the price of the motorcycle, and I'd rather just have a cheaper motorcycle.