Undergraduates with family income below $200k will be tuition-free at MIT

This is a great step in the right direction. I can't speak directly for MIT, but there are issues with how these programs don't apply to parents with small family businesses. My parents had a small business, with my father taking home a salary of $XX,XXX. Duke University used the business assets to determine the EFC (expected family contribution) of literally 90% of the salary. Essentially saying to sell off the family business for the college fund, which was a non-starter.

Small businesses are allegedly the backbone of America, and I feel these tuition support programs overlook this segment of the middle-class.

Why are such things in the US so complicated? Where I live, studying is much much cheaper for most professions,for everyone!

That's the only fair way. Also, a set of well educated people pays itself back later in the form of mostly income and added value taxes, which provides money to keep studying for cheap for the next generation.

Because the US government will loan people very large sums to attend, which allows the universities to raise prices at will. The buyers are price-inelastic, which means that they want to go regardless of price, because they are surrounded by people that tell them that going to college is the right thing to do - and the more prestigious the better.

College in the US would be a lot cheaper if the government didn't inflate it. If you go back in time just a few decades, this is how it was: you paid for it, either in cash or with a PRIVATE loan, and people didn't see college as an automatic requirement. Then it was 1/10th as expensive.

This is a common myth. This might explain why Harvard or MIT tuition is high but not the average college. Tuition mostly reflects staff costs and those have been going up due to Baumol's cost disease. Dentists, along with many other industries with its main cost being highly educated staff that haven't managed to scale production like online brokerages, have had a similar price increase since 1970.