brimic, it seems to me that the whole deal involves a rather cold-blooded, practical view about "overhead".
If you've found the house where you want to live until you die, that's fine; buy it and pay it off--assuming you have no qualms about your long-term income and the affordability, etc.
Otherwise, if you move from town to town, job to job, it's a whole different deal. For a given house, which costs less: Renting, or buying? Factor in the interest deduction in this. I grant that if you can buy when prices are rising, the profit potential is there, but no boom lasts forever. Repeat after me, "No boom lasts forever."
If buying costs $1,500/mo, PITI, and renting is $1,000/mo, that's $500/mo available to invest. I leave it to the student to figure what compound interest does to $500/mo over some 25 or 30 years; 6% is not unreasonable...
Art