Those who stupidly "take responsibility" for their child's amusement/entertainment, and those who do not.
The former are bad parents. The latter are the good parents.
Without boredom, and letting kids learn to "amuse themselves" (take responsibility for their own occupation/entertainment) at the YOUNGEST POSSIBLE AGE, children will
A) forever be bored, a slave to Hollywood, video games, youtube, social media, vacations, etc. in a constant pursuit of exterior amusements to "amuse themselves" and "avoid boredom".
B) will never amount to anything. Will be failures in life. Or at least, will be FAR from anything resembling greatness, for any skill you can name.
C) will be generally boring/uninteresting people, with a skill learned in adulthood to eke out a living AT BEST.
Boredom is the seed of greatness. Boredom allows children to go DEEP into some study, skill, or training. Those childhood years -- thousands of hours of free time, with no responsibilities -- are irreplaceable and priceless.
Even time spent playing with other children, or watching birds in the backyard is SO beneficial in ways we can't understand -- compared with passively sitting in front of Youtube for hours, or scrolling TikTok on your phone.
Think of all the problem solving. Think of all the brain pathways formed and exercised.
Just look at children who grew up in the 70s or 80s. TONS of opportunity for boredom. No internet, limited TV. They did things like ride their bike to the newsstand to get the latest electronics or ham radio magazine, so they could ride home and read the whole thing cover to cover, and then build the stuff they read about (not talking about myself BTW, but I'm talking about *multiple* guys I know now). Imagine if these guys had the option of video games, or the Internet! There's no way they'd go so deep into self-taught electronic circuits. But these guys have accomplished much today. Some are electronics engineers and/or have very high-profile (and enough to live on) Youtube channels.
And even if they're not rich today, they're objectively "great" or famous based on what they've accomplished -- what they can do. If they're objectively great, that's good ENOUGH in my book, even if they're not rich or famous.
Also, this isn't about worldly success. I would hold up anyone who is objectively great in the spiritual sphere as well. Maybe a kid who knows how to serve, with knowledge that rivals a seminarian, etc. or who has mastered Church History and Apologetics. There is much you can do for God (build altars, deal with people, help souls, volunteer at your chapel, etc.) once you have objective skill(s) to offer the world. Think of all the things the Church needs done -- but you aren't much help if you're an objective loser. If you're a loser, all you can do is warm the pews and pray. It's much better to be able to contribute time and money, because you're not a loser.
Also keep in mind that God gives different gifts to different people. If He gave you the Ten Talents (rather than 5 or 1), he's going to expect something in return. Not 4 decades of indulging your curiosity watching one Youtube video after the other. You can fool yourself, but you'll never fool God. We're talking about the vice of Sloth here. Sloth is NOT defined as sitting on your ass all day. Sloth is doing something OTHER THAN what you should be doing, it's avoiding your duties of state. It's indulging in excessive recreation. It's habitually taking the "easy road" until that becomes a habit.
Will today's internet-addicted youth be remarkable in various skills (profitable or not) when they are in their 40s? Not a chance.
They'll be lucky to be able to survive on their own without Mom & Dad (and their money) and/or the Government and its money.