The point of education is to give children the knowledge at whatever level, to support themselves and benefit the nation, schools are failing
One of the many benefits of a rounded education is the ability to recognise that there are many points of view on a lot of things, and the ability to put across your own without alienating your audience
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I'm guessing that you aren't speaking from the perspective of a former educationalist of any description, but on the off-chance I'm wrong, which educational theorist claims that 'the point of education' is anything, never mind that the point is to benefit the nation? That is something of a Victorian outlook, and most modern theorists consider the subject 'in the round'.
The nation is likely to benefit from having a well-educated workforce - if children are segregated young and only taught 'work skills' a lot of talent that could benefit the nation will be lost, as was the case when only 5% of people went to university, and 95% never got the chance to prove what they were capable of. Who knows what they might have gone on to do, given the opportunities that were denied them?
It is in the interests of those with high level qualifications to keep access low, so that they remain 'elite' (although that ship has largely sailed), and of employers who would prefer to have an ill-educated workforce who can't pick and choose from a range of employers, and will work cheaply. I don't think that benefits the nation, and it definitely doesn't benefit individuals.