Some people support the appearance of primary and secondary education here, not only because knowledge is a social requirement for individuals, and students will regret not studying hard in the first place, but also because strict education can sharpen people's will and character. I think this is the most inopportune of these three reasons, because although people will always regret their laziness and even hope that their parents and teachers would treat them more harshly, few people will regret that their will and character have not been well sharpened, and it is difficult to say that this grinding is beneficial to society in the current social environment. Moreover, if a person has been unwilling to accept them, then external constraints cannot sharpen the person's will and character, they will only leave a bunch of habits that will be easily abandoned, so "regret not being sharpened" is just a synonym of "regret not working harder", and teachers who feel that they are sharpening the will of others should know that doing so will always fail, and all you can do is some temporary constraints.