School is like slavery in many aspects to be honest. Though it‘s really not a physical one, but a mental one.
You can not do much without getting permission from an authority figure first, including relieving basic biological needs such as eating or using the bathroom. You are not allowed to leave the facilities without permission. You are classified into different groups based on your performance on tests, and eventually seperated based on that (usually at high school/university level). You are trained for at least 12 years in this way to obey arbitrary rules and procedures, which are designed to get you ready for the capitalist hellscape that awaits you. Some countries even use this period of time to push another agenda on you, usually one related to religion &\ nationalism. At last, you come out of it (while probably having forgotten many of the things ”taught” to you) and you are immediately put into mandatory military service, or you come to the point of needing a service job just to survive.
Autodidacticism definitely rocks, and homeschooling would be a better idea if one was qualified for it and the child's social needs could be met elsewhere.
Kinda unrelated to your example, but I just wanted to expand on your psyop comment.
The problem with your first point is that in the case of language acquisition, there is no "aptitude" for it. The process of language acquisition is more or less the exact same in every person, the only exceptions being people with literal neurological disorders. And you don't really need unlimited time for this process. It takes around 1.5 years of immersion at 18 hours per day to reach 10,000 hours, 3 years at 9 hours per day, and 6 years at 4.5 hours per day. The trick for reaching the 10,000 hours is just actively consuming compelling TL content whenever you're free and would normally consume native language content (active immersion), and then listening to them once again while on your way to work or brushing your teeth or something (passive immersion). As an example for compelling content, what drew me to learn English in the first place was mostly popsci and video game content that I was really interested in and that were simply not available in Turkish. I would also recommend having smaller weekly goals instead of one gigantic goal that you are likely to stress over (like the 10,000 hours).
And the concerns you list are mainly time & motivation related, but the OP is asking if some people are literally worse at/incapable of acquiring a foreign language, which is not the case at all.
The guide I mentioned in my comment covers more topics than I could ever fit in a comment, including different types of immersion (passive and active), different types of active immersion (intensive and free flow), SRS, software, other helpful websites, techniques and much more so I would just recommend giving it a read if one decides on diving into language acquisition.