I have extended the life of wiper blades by cleaning them!
Just a fingernail but better yet a cloth & your fingernail cleans much of the grit off.
The roads are dirty and accumulation builds up on wiper blades.
You can feel the grit come off and how the blades feel cleaner afterwards.
I could see drier climates wreaking havoc on blades. I have used Simple Green to condition rubber in the past. It softened rubber. Maybe that could extend wiper life.
EDIT: I agree with jage. EVERYTHING
is made cheaper and consumable these days.
I believe its a Chinese plot to take us down - cheap commodities and lead...
ANYTHING CHINESE IS CHEAP.