Washing produce, even very carefully, may not remove all the bacteria present.
Rough surfaces provide lots of places in which bacteria can hide out. You may want to wash rougher-surfaced fruit more carefully.
However, according to Live Science:
“For vegetables and other foods that are eaten raw, the best way to prevent outbreaks ... is through cleaner farming practices ... When the water used to irrigate the food crops is drawn from wells that are near livestock, fecal bacteria can spread through the water to the food.”