And I can be reasonably sure my gun will work when it worked yesterday. Just like I can be reasonably sure my car will drive when it drove yesterday. Neither needed to be taken apart and cleaned in order to make that determination. And it didn't require checking to make sure it was put back together correctly.
If cleaning guns makes you happy.......go nuts. I know more than one person who has an affinity for Hoppes # 9 smell. I'll even admit that once in awhile I get all nostalgic for it myself. But cleaning guns under the pretense it is somehow necessary to "ensure proper function of life saving equipment" is not a theory I will ever subscribe to.