A parent should never force a kid into a career they absolutely hate but they should get the final say in a career choice.

Why should a parent get the final say in a career choice? It's not their career, it's their children's.

Some people randomly choose careers that a parent knows won't be good for them overall

And some parents will choose a career that won't be good for their child overall. Just because they are a parent does not mean they are guaranteed not to make stupid career choices.

and wouldn't generate enough money

I only half agree to this. While generating enough income to survive is obviously of great significance, money itself should not be the top priority when choosing a career. Regardless of what point you were making, I just wanted to make sure what I just pointed out is very clear.

or intellectual challenges or even career opportunities that would meet the kids standards. Your parent will most likely know types of jobs more than you do and

You're basing your stance on a lot of "if's" instead of facts.

if they're half decent parents than their choice won't be that bad.

This statement highly concerns me. Their choice won't be that bad..... as to say what? That even if the choice is something you don't necessarily like, oh well, tough luck, the parent knows best? I don't believe such nonsense when it comes to a career. To a job, then I would be more willing to comply with that logic, but not a career.

A kid should always play a part in the decision though.

Whoever the career is for, is who should make the decision, their loved ones can and should play a part.