1) No one is entitled to a career in cybersecurity or reverse engineering, no matter how poor or sad your origin story is.
2) There are always lucrative opportunities in this world that are out of reach by people who lack some resource. In this case, it's money, but it could easily just have been something like popularity, beauty, connections, location, or even plain old brains.
I always wanted to be popular and loved by many, but I came to accept long ago that it just wasn't going to happen. I'm an introvert, I keep to myself a lot, don't get much pleasure from social outings, and at the end of the day people just don't give a fuck about weird people like that. So I just try to enjoy the gifts I do have and the things that come naturally to me. We all have to accept the realities of our lives at some point, even the poor.
Sorry to hear you're finding it tough. Some people find ways of becoming less constrained by their introversion, but no judgment on you for doing what works for you.
It's true that some pre-existing conditions can limit what options people have, but it doesn't apply to everything.
It's important to be discerning about when this effect applies and when it needn't, and work to open more opportunities to more people wherever possible.
Then think about the fact that some people are poor and can't float thousands of dollars long enough to learn and get employed with tools like this.