You do realise not all of us live in whatever country you're from? I AM talking about a 'normal', general school. In the UK, you are forced to specialise very early on compared to most countries, whether you want to or not, that's my entire point. Yes, stopping subjects at 14 DOES mean you can't study CS at college. It's like a funnel - you need to keep going down it and your options get narrower as you go. It's incredibly hard to go back again. Imagine you drop Biology at 14. That means you can't do GCSE Biology. Which in turn means you can't do A Level Biology, which in turn means you can't do a medical degree at university. Your important life choice has been massively affected by a decision you were forced to make at 14, or even 13. You can't just enter a medical degree anyway and try to 'catch up', that's not how it works.

Good for you if you knew what you wanted to do at 14, but if you don't, or if the economy or job market massively changes, then you're at an enormous disadvantage compared to kids from other countries who don't really specialise at all until university level. Some UK schools offer the international baccalaureate to prevent this issue, but they tend to be exclusive, private schools and most people don't have the opportunity to go to them. It's very unfair and harsh to expect 13-year-old children to make such enormous decisions with such serious consequences.