How do you understand "foolishness is a moral defect"?

Different people have different moral values. There is no way to say it is a "moral defect" if it does not reach a certain level. As far as my personal understanding is concerned, the following situations in life are consistent with the problem.

"Don't care so much about your children." I think this is a behavior of selectively ignoring the interests of others. It can also be regarded as a stupid behavior. It is an attempt to "don't care about children" with "ignorance". "Caress" and so on to avoid the losses caused to others. This kind of parent makes me despise. Parents of children have responsibilities. This kind of behavior that shirks the responsibility on their children and avoids bearing the consequences is "stupid and immoral" in my opinion. ".

Pirated games: "You are so good, make a game yourself." For example, everyone must have heard about the dispute between "Minecraft" and "Mini World". Players of "Mini World" The most common arguments I hear are "I just want it to be happy" and "If you have the ability, you can make one yourself". They don't want to understand, nor do they want to understand copyright awareness, etc., and all kinds of game-induced contempt chains. I won’t go into too much detail about the big news. In my opinion, gaming culture, as the ninth art, has been turned into a mess by such “stupid” players. This can be regarded as a moral flaw.

You can never wake up a person who is pretending to sleep. There is no omniscient person in the world, but there are many stupid people. The cognitive errors caused by stupidity often have a great impact and are deceived. Those who are in the dark are often stupid people.