The CPUs in question support up to 16 GB of LPDDR3 or 32 GB of DDR4, but do not support LPDDR4. Apple needs the LPDDR* variant to meet their power budget.
I'm pretty confident if Intel's CPU supported more RAM they would of made it a configurable option. Apple still has configurable graphics cards, hard disk sizes and CPU speeds. RAM could of easily been another configuration they could of offered.
Like I said previously, the MacBook Pro is a mobile device so making a trade off for power efficiency makes perfect sense to me.
My only point was that this really isn't something that Intel does or even should care about, it's the result of Apple's decisions; isn't even necessarily their "problem".
Also, if low-power, long battery life and low weight are not your requirements, maybe you're not in the market for a laptop?