[armada651]

Then charge the customers more for a 5G subscription and if they don't want to pay that and are quite happy with their "slow" 4G connection, then that begs the question whether 5G is worth the investment at all.

Making content providers pay the ISPs doesn't help consumers at all. Because content providers will simply increase their prices to cover the extra fees, so consumers are either going to pay their ISP more directly through their internet subscription or indirectly through their content subscription.

This whole idea is just a way for ISPs to raise prices without actually sending their customers a higher bill. They'll simply let the content providers take the fall for it instead.