I do agree with you that easy credit is only part of the problem and that many borrowing more than they could afford is also a big problem. Then again, they are one in the same...easy credit = borrowing too much. I also agree with you that a physician is not the average borrower.
On a recent National study, Charlotte NC was the only city that did not have home price depreciation. However, that does not mean that there are not pockets or areas that are still in demand. You should also take into account that it is possible that we are not near a bottom and your seller's market may turn into nobody's market real fast.
I wasn't assuming that all residents don't have the money to put down on a home. I was responding to your statement, "Unfortunately, many of us (myself included) are too poor to even afford the 3% down". My point was that if you don't have enough money to put down on a house, you should not be buying one. On the other hand, I do agree with your logic that if you have the reserves/assets then maybe you don't want to put it into your home's equity.
If you do in fact find a resident's loan at 5.5% or even 6.19% on a 30 year fixed with no PMI and a high LTV, I would love to know about it. When I say "find" I mean someone in today's market that has closed on their loan at that rate. I personally can't believe that that would be possible, unless you are buying the rate down quite a bit. If it really is still out there, I would agree with your logic.
Everyone's situation is going to be different, but I am looking at things from a lender's risk standpoint. Across the board 100% financing is a dangerous loan. You may have the reserves to put 20-30k into the home to sell it, but many others would not be in that situation. This is the same reason why thousands of homeowners per week are walking away from their homes.
You mentioned that you are looking to spend $1500 PITI. I am not sure where you live, but I live in FL and I was paying over $1500 on $148,000, 30 yr fixed at 5.5%. Granted, my taxes and ins. were probably more than you will have to pay. Just out of curiosity, what state do you live in?
I apologize for generalizing, but when you give advice on these loans it is important to consider the financial risk that the borrower may face down the road.