Strawberries soaked in a solution of one part white vinegar to four parts water for 10 minutes, then drained and patted dry with kitchen towel will las much longer in your fridge. So that is worth doing,.
I use the pillow (pre-washed) bags of mixed lettuce leaves, Once opened, I put the rest into a clip& seal box lined with kitchen towel - like this in fridge vegetable drawer it lasts a week for me to use. Do same with small pre-washed bag of Spinach leaves. I do not wash them.
My 'fridge is one of the newer Harvest Fresh types, which has lights going into the veg box, which (the publicity claim) mimics the light in the fields and helps to keep everything fresh. Works for me, by myself and only doing a once-a-week shop of salads stuff.
The only time I can remember getting a bad bout of food poisoning from unwashed fruit as back in 1963. Five of us were on our way home from holiday in Skegness when the little Ford car broke down in the middle of nowhere. Whilst the tried (unsuccessfully) to fix it, my friend and I clambered into a nearby field and picked the lovely juicy blackberries there. I ate far more than anyone else, and by the time we did get back home, several hours later I was already feeling pretty ill. By the following day, was very poorly and GP thought it was some sort of poisoning from whatever chemicals had been used to spray those bushes.
Looking at the thread here, I am obviously very slovenly in my kitchen hygiene habits, and suppose that I have, therefore, built up an excellent tolerance in my own gut.