Who said anything about the inability to pay them down or pay them off? Obviously you dont know people in that situation or the cost of that kind of education. I know many and they often finish with $300 to $500K in debt despite living off Top Ramen and driving 20 year old beaters. Many of the loans they have to take out are at high interest rates and it behooves them to pay them off as quickly as they can. Even with incomes starting above $300K/year and quickly rising above $500K it can take 10 years for them to do so which means no saving up for a massive down payment. They also often have to buy into partnerships and fund business. Under your model these people should not be able to purchase even modest homest homes until their mid 40″s despite having virtually guaranteed income placing them in the Top 2% of households in the country. Sorry while your model works for worker bees it holds no water many folks who are more upwardly mobile.
As for me I have plenty of better things to do and do so. I am in and out constantly and live a fairly fast paced life. I cant help it if my week beats your year.