I bought a converted barn for 90k in 1999, in 2021 sold for 450k.... don't tell me inflation was 400% + over 22 year.
Bought a house 2 years, its now worth 35k more than i paid for it and i paid top of market, will never realise the profit though as its rented to a very close family member, the only reason i would have ever gone into that sector.
Cash bought property can be profitable, above inflation, its interest rates that devalue.
On CGT, your argument would apply to any asset thats sold, that is why there is an allowance, though this is v small now and remember, expenses are offset against CGT, good record keeping is essential and of course CGT ONLY applies to a property that is not your main residence.
On IHT, the person inheriting gets the assets, that is entirely unearned, so why shouldn't a deduction be made from the estate?
Up to 1m is tax free.