My point is, that the "value" of that house is negated by the cost of a replacement house or the cost of renting.A house is still an asset whether you want to believe that it is or not, I'm sorry that reality conflicts with your own imagination.
If your house is worth £100 and average rent is £1/month, or your house is worth £100,000 and rent is £1000/month, how are you better off with a £100,000 house? Assuming you aren't going to sell up, ***** all your money then die of a cocaine overdose with a smile on your face?
Actually the country is much better off with houses worth £100 each than £100,000 each. In the current climate, having a house that's worth £250k does *not* make you any better off than having a house back when they cost £40k each. You always need a place to live. If you sell your house for it's cash value you will still need to buy another or start renting. If you rent, you will pay market value and quickly (over a period of years) lose that money.
That idea that a family is "well off" because their £40k house became a £250k house over the years is not in keeping with reality. Unless you intend to sell up and move abroad, somewhere where housing is cheaper...