The big problem with DR's advice is that it completely lacks nuance. For instance, I have a car loan. I know that makes me terrible, but whatever. That car loan is at .9%. If I were to follow DR's advice, I would frantically try and pay that car loan down AND THEN WHEN DONE I could start investing in my 401k. Well, my employer matching on my 401k is 100% of the first 6%. And my ROR on my 401k is somewhere around 10%, +/-. So if I followed DR's advice to the T, I would sacrifice 1) all employer matching contributions to my 401k, 2) all tax benefits of diverting income to my 401k, and 3) the returns I make in my 401k. All to avoid paying .9% inerest on a loan that's about 3% of my monthly gross.
On what planet does that make sense? It's almost criminally negligently bad advice. And oh by the way, this is a car that will be paid for in year 4 that I own it and I expect to own for 10-12 total years.
Same with my wife's student loan. She consolidated back in '05 at literally about .05% interest. We pay $88/mo, automatically deducted from checking. The remaining balance is, oh, I dunno, $6k? I could write a check for it tomorrow and be done, but at .05%, why bother? I think even my checking account gives a better return than that.
You need to take DR's advice for people with money problems the way you need to take a reformed alcoholic's advice on booze; as if he's speaking with other alcoholics. If you aren't an alcoholic, the occasional beer or drink ain't going to hurt you. It's only if you're an alcoholic must you abstain completely, otherwise it's not great advice.