Simple answer: because the software industry is a goddamned joke. It's full of complexity-fetishists who are arrogant enough to try and call themselves engineers while producing objectively terrible products and patting themselves on the back for it.

Remember a while back, when Casey Muratori told Microsoft their terminal emulator could be a lot faster if it used a glyph index, and professional Microsoft engineers told him that was complexity worthy of a doctoral thesis [0]?

There's a reason he got so mad at them, and its because this level of "competence" is pervasive in our industry and he has to see it every single f'ing day. See also: "When does the draw window change?", a demonstration of how Microsoft's flagship IDE's debugger fails to compete with a one-man project.

https://imgs.xkcd.com/comics/voting_software.png

[0] For anyone not in the know, this is essentially just emulating how a real dumb terminal from the 70s would work, is the blindingly obvious implementation, and would be familiar to just about any game developer on earth. Casey spent the next weekend coding a 3-orders-of-magnitude faster terminal display demo that was completely unoptimized as a demonstration of the lower bound of how fast a terminal should be. Microsoft's terminal is still not as fast, even though they did eventually implement his solution without, initially, giving him any credit.