Owning your own home

Just because you are on a repayment mortgage - it doesn't change the fact that YOU ARE PAYING INTEREST.

I used interest-only in the example because people get confused with repayments.

Are you an IFA?
What exactly is an "investor"?
What is wrong with saving somewhere OTHER THAN IN YOUR HOUSE.
That's all that happens when you invest in an ISA or pension or whatever.
It is a simple investment choice.

What happens if you get to the end of 25 years and you own your house but have no pension? How are you going to buy food?

Sure I can't guarantee that a pension investment will return more than whatever interest rate you pay on your mortgage but any IFA will tell you that DIVERSIFICATION is a good idea on both a risk AND reward basis.

There is no magic.
What's wrong with owning your house and paying the interest for living there and NOT being able to pay down the principal.
IT IS EXACTLY THE SAME AS RENTING. And no one is giving renters a hard time because they can't afford to save over their rent!!

Sure you won't own the house at the end of 25 years - JUST LIKE RENTING.

I'm struggling to see what the point is you are making.

Interest only mortgages are not exactly the same as renting, yes the repayments are the same, but your final return (if you ever sell) is dependant on market prices, and may well be negative. That's why it's a stupid idea unless you are an investor,

By investor I mean someone who buys property with the aim of making money from it rather than living in it. I thought that was fairly obvious.

I don't intend to ever sell my flat, or if I do I would replace it with another property, so I couldn't give two shits about house prices.