I'm not sure I follow - if you rent you don't pay ground rent. If you are a leaseholder you pay ground rent to the land owner to have your home ( that you own ) on their land. If you're a leaseholder then you just sell your property - no landlord involved.
Indeed. How they ever got away with it amazes me. The story of the ground rent being £10k a year by 2060 is disgusting. I get leasehold on properties that share land but for a house ??