Lana I would argue no, it does help cut down on habitual masturbation, with many men struggling with habitual masturbation being borderline addictive. There are a lot of men out there who feel like their sex life is suffering from habitual/addictive masturbation, and who need help trying to quit masturbation completely or at least cut it down to a healthy level. There are programs like NoFap that provide support groups for men trying to quit masturbation, though most of them discourage the use of chastity devices because for some people, it is a fetish toy, for others, it feels like a cheat that does not help the wearer train their willpower. As for helping with focus, yeah, unlikely to make a positive difference, unfulfilled sexual relief tends to cloud most males' senses.
Now, as for parents using chastity devices to prevent male masturbation... you do have a point that most societies, western or otherwise, have a lot of gender-based double standards when it comes to promoting sexual abstinence. However, those sexual standards are typically based on having sex with partners - there are parents who consider a daughter who has had unmarried sex spoiled goods, whereas no such thing is typically thought of sons. However, masturbation prevention is more of a gender-inclusive affair - anti-masturbation campaigns from the 19th and early 20th century typically considered masturbation of either sex a foul affair - which promoted the spread of routine male circumcision in America, for example - and the common biblical story used to condemn masturbation is the story of Onan, a male who "threw his seed to the earth" instead of ejaculating into the woman he was supposed to be sleeping with.
Meanwhile, the vast majority of sex offenders are male, so if you are trying to use mandatory chastity devices to cut down on sex crime, preventing penises from going erect would tackle that problem at the root.
Also, one might argue that the reason so many men get into habitual masturbation in the first place is because most of them are not raised to abstain from sexual pleasure as much, at least not as thoroughly.
Lana If there were to implement the law, maybe they would invent a smart chastity belt which can be remotely opened by an app. For emergencies, there maybe an option in the app to open with a reason to be listed. For cleaning breaks, there maybe an option to open for an hour twice everyday to handle cleaning and miscellaneous stuff. I have more ideas about this, I had free time and I just thought about this, so that's why I created this thread
Smart features integrated into the belt would mostly need to be a system to detect that it is locked around the right person, and maybe to prevent or at least detect any methods of cheating the lock. Anything else could be handled with an electronic lockbox.