[skandinaff]

As to continue my anecdotal story, I could safely say that all of my interactions with computers up until the age of 14 were purely gaming with occasional drawing in ms paint. Even so, at the age of 14, I did manage to create a simple html web page, and install a php based web engine, those actions were barely conscious, just following some tutorials in my mother tongue. Only at the age of 17 I made some first real steps into using computer to compute, write first simple programs, and began to be able to understand how it actually works. I'm pretty sure, that all of the time I spent with computers before 14 contributed less than 0.1% into "getting into STEM" and that learning English, reading actual books, spending time in extracurricular classes did way, way more. But then again, that's just my personal experience. Though I believe, it's of many.

[Xirdus]

You are not giving your 14 year old self the credit they deserve. Creating simple HTML webpages is beyond capabilities of most adults even when following tutorials. I personally witnessed many 14 year olds who failed at literally that. In school setting. Where they had a human teacher they could ask for help with anything, so much better than just a tutorial. Without PHP, just static HTML files saved on desktop.

Years of gaming let you internalize a huge number of UX idioms that you rely on everyday, like left and right mouse clicks, hierarchical menus, hotkeys, text input, active and inactive UI elements, navigating documents larger than the viewport (drag/scroll wheel/scroll bars), and so on and so forth. Imagine how much harder it would be for your 14 year old self to install and run XAMPP or whatever if they knew none of these things. Imagine how much harder it would be for your 17 year old self to begin their programming journey if they didn't already know what a file is.

Looking back from the end of the road, those 0.1% might look tiny and insignificant. But there's a high chance you'd never go into programming at all if you didn't play video games as a child. Not because of the games themselves, but because they gave you early exposure to computers. If all you did was browse Facebook instead, the effect would be much the same.