I think your comment is itself missing the point of the article: to the extent that housing is "affordable" in the sense that most necessities are affordable, it would not satisfy your points 3 and 4. That is, if it fell in price over time like food, and so were affordable in that sense, it would fail to be a hedge against inflation or market forces.

In fact, if you replace "housing" with "food", you see a natural response to your penultimate paragraph: "You're never out of the market for food. Therefore, it makes sense to buy a forward contract that pays out a [predefined] basket of groceries forever." The error in logic is that you expect food to fall in price, and or your tastes to change, so locking in such a contract would probably be a poor use of money, considering what they would charge.

It's less obvious, but the same logic applies to your points 1 and 2 as well. The very reason that a home provides security and stability is because you expect to get priced out of that neighborhood, or difficulty in moving to another nearby, similar home. That's also an artifact of housing being made "a good investment" by policies that make housing more expensive over time!

So, yes, housing does provide those things, but only because current policy picks one branch of the affordable/good investment dichotomy.