Nah, the point here is that you should monitor your kid being on YouTube. And you can do this.
Computers have the built in resources and mechanisms to limit access.
Saying you can't control when your small child uses the internet is bullshyt.
Again missing the point entirely and maybe this speaks on the way society as a whole is going. You can not monitor what your kid is doing 100% of the time, not possible, and you shouldn't be expected to. When I was a kid I had a bike and I could leave the house and go down to my cousins house, or a friends house, or to the store, or wherever the hell I wanted as long as I was back by a certain time. You know why I could do that, not only because my mom trusted me but because she trusted the environment I was in. She knew if I was around my boys house his parents would make sure I'm aight, if I was at the park playing ball there were people there who would look out for me if something happened, etc... Everyone looked out for you because in return you were expected to look out for them and theirs. Today, you let your kid walk up the street to the park alone and a mufukka is likely to call the police and have you ticketed for abandonment. There is this feeling that not only are you 100% responsible for this child but it's expected that you should be personally monitoring them at all times, hence the term "helicopter parenting".
How does this relate to the topic, well now we not only have a physical environment but there is a digital environment as well. You can block your child from YouTube at home but again, what happens when he goes to school and a friend wants to show him a Spider-Man cartoon clip on YouTube? There is a high chance one of those inappropriate videos will show up in the recommended list and they will see it. What happens when the kid is spending the night at grandpa's house and uses a phone, etc...... You are thinking of it as this is only a problem for 2 year olds, I can assure you it's a problem for age ranges much higher than that and the older your child gets the less you will be able to 100% monitor every little thing they could possibly do.
So it comes to asking for help from YouTube on tweeting the algorithms or something to keep that shyt away from areas it doesn't belong. In Germany they just passed a law that fines social media companies if they do not perform due diligence in removing hate speech, fake news, illegal content, etc...... But using your logic that shouldn't happen right because purposely misleading and dangerous content should just be avoided by the user, you can't expect content curators to be responsible for what is on their platform. And finally I don't understand why removing or limiting access to said content is not already a focus point for YouTube as it would be in their best interest to do so. Aren't content creators paid ad revenue for video views? Well we have a case here where people are purposely creating videos and tags to steal views from legit content and earn ad revenue.