I wrote a whole thing about how you were wrong and just shaving with a safety razor and replacing the blade frequently would solve your problem, give a better shave, and reduce waste. I went looking for photos to show how dulling happens from blade use, and found a study that contradicts everything I thought I knew about how razor blades dull.

It turns out, you're right. Most dulling is caused by a combination of corrosion from water and from hard water deposits left on the blades from evaporation. Physical burring and microchips in the blade edge really don't affect the sharpness of a razor blade until it has been used for months.

The key is that you have to physically remove the water from the edges of the blade first before drying with a hair dryer or your breath. Just using a hair dryer means that the hard water scale will still happen.

I still think that using a safety razor gives a better shave overall, it reduces or eliminates the need for elaborate drying practices, and produces far less waste than cartridge razors. The difference in blade sharpness just isn't as extreme as I thought if you dry the blades properly.

Here's the study: https://knifesteelnerds.com/2021/01/11/what-causes-razor-blades-to-dull/ It has its limitations, but it does seem to eliminate microchipping as a significant cause of razor dulling.

and

Looks like washing in alcohol or distillated water will do the trick as well

or

Shake the water out and then put the shaving head in a small cup filled with baby or mineral oil

in addition

I wear blue jeans when I shave and I run the blade downward with the grain 8-12 times after I’m finished. This dries it, but it also helps hone the blade.

Source: reddit, a study, safety razors