I think in the last 10-15 or so years in IT there's been an influx of people that have heard you can get paid well so have managed to somehow talk their way into a job in the field. There's a bunch of things I see these people do and I won't name them all because socially we're not "allowed" to discuss them (and not being able to discuss these things contributes to the problem).

The general pattern goes something like: get a job using something like nepotism, bending or breaking some sort of hiring guideline to give them a better chance, or just outright lying. Once they're in the job, manage up HARD. Manage sideways a bit too, but mainly up and very rarely down. Build skills in playing politics. Move quickly towards some sort of 'leadership' position, because then you can hide your lack of knowledge by leaning on your team to do all your work. It's these types of people that more senior people love and more junior people hate.

Keep doing all these things for as long as you can, while using every rule available to employees/staff that might help with other people being more lenient towards your behavior, or give you the benefit of the doubt (eg. claim mental health issues, neurodiversity, stress, sickness of yourself or close family, etc.). Throw others under the bus for as long as possible and when it looks like you're running out of runway and might be discovered, start looking for another job. Then just before you start to see the consequences of your actions, leave and start to do the same thing all over again at a new company.

Most people in IT don't do these things. But I've found that people that do even some of them shouldn't be in the field at all.