Well it's fine to replace your filters if that's what you want to do, I just think it's being excessively obsessive!!!

I've washed my filters on my quad & truck (K&N's) & my RC car many times & when looking at the intake tract or in case of the RC car the rubber inlet hose I've never seen any dirt.

So if you want to send me your discarded filters I'll clean them & reuse them!!! LOL!!