Your missing the point.
Affordability is at its lowest point for decades and decades. Wage inflation has pretty much stalled and is at increasing risk of being deflated ... basically living in a global environment means everyone has to compete with everyone else for wages. Proof? The manufacturing industry, farming, call centres, IT ... the list goes on - but the fact remains that people arent going to be able to rely on their wages going up and eroding their mortgages like they did in the 70's. Thats where the term 'ladder' comes from - you remortgaged in line with your earnings and could afford better and better houses.
So - prices go up, and wages arent going up much ... that means your stretched as it is to afford a house with the monthly repayments. Regardless of the fact that property over the LONG TERM will go UP in value, you still have monthly payments to make for 25-40 years of your life.
In 1988 the press was full of the same kind of 'advice', and 5 years later, prices had dropped in real terms by 40% - which means you could have bought a house 5 years later for probably half the monthly payments that it would have cost before that.
So .... given that once you get a mortgage, youve signed your life away to make those payments for a very long time, is it not best to do that at the right point, and not at the top of a boom.
this golden day when you flog your house and make 100 grand on the equity sounds great - but its all about what that 100 grand will actually buy when you get there, and the struggle you had to make for all those years to get that 'pay off'.