I think we are told not to wipe blades because law school is expensive and its tough to pay off your school loan, your vacation home, and your Mercedes at the same time. It's lawyer talk pure and simple. That said, I think blade-drying and hand stropping are quite unnecessary and only add so much "fiddle factor" to an already time-consuming process. I use a blade three days and toss it. Could I get 4 or more? Possibly. But, I don't see any reason to have that last uncomfortable shave while trying to eke out just one more shave from a blade. I'd say if your retirement plan hinges on getting 5 shades per blade rather than 3, you've got bigger problems than blade management.
It is not about the money. It is nice to stretch the cost of a blade such that the cost is less than $0.01 per shave, but that is not the reason that I try to stretch a blade. It is about getting maximum performance out of the blade while still getting good shaves. Why not try to get the most out of my blade and my technique?