I've flown them in very wet climates and very dry climates. I've operated them from very remote locations using stored gas in drums and cans, filtered through a chamois to clear contaminants and water, and operated in places where there was NO help should a problem arise. There is a way for water to be trapped, yes. Very small amounts, true. Sort of like wandering back into traffic to see if one will get hit again.
Most folks know better.
Such pilots don't have the experience to know that most all designs are subject to certain limiting factors, and that most all designs have their own peculiar traits that must be learned as part of learning to fly that design. That's basic piloting, nothing else. With regard to the flap issue on Cessna's, it's a non-issue, period. So is water in the fuel, if dealt with properly. I certainly won't state that it hasn't happened yet, so it won't.