As someone who's worked as a software engineer in the bay area in tech companies this is 100% not my experience at all. Though tech interview definitely matters, experience also matters and the turnover is not insane. All of my coworkers who I have made friends with are still in this business and I've worked at a few different places. I just don't think you have any idea of what you're talking about.
> you have no guarantee to make any sort of career.
I have quite a good career. Others do too.
10 minutes out of 4 hours, that's like less than 5% devoted to real world experience.
That said, having gone through loops from the other side, I know this isn't always the case and that your mileage may vary.
Actually, all of the jobs I've had have cared very much about past experience and have asked about it in the interview. If I weren't actively contributing in certain open source projects, and hadn't worked with certain technologies, I wouldn't be where I am.
Finance cares that you have past proven experiences in finance and they'll hire you for it.
Breaking into finance is the hardest thing to do, once you're in, you're good and you can have a great career.
Tech companies don't care what you've done and they rarely, if ever, ask about it.
Breaking into tech companies is only about rehearsing Cracking the code interviews, and once you're in, you have no guarantee to make any sort of career. You'll probably be out soon because things move too fast and the turnover is insane. Your next job is gonna be difficult to find because the next tech company won't care about experience and will try to pay you with free food.