> What the hell is wrong with this industry that experience in the industry is considered a negative? For every other skill the more you do it the better you get, yet the logic here is that the more one works with tech the worse one gets at it.

I can believe that experience of doing (say) chemistry 200 years ago might be so different from current practice that it would be of negative value. Tech changes a lot faster than that. Certainly in practice I've found working with experienced people worse than working with fresh grads, because fresh grads tend to be empiricists, whereas experienced people tend to have fixed technical views that are often outdated. (Of course this is just my subjective experience).

> The only comparable jobs are high impact sports. An older boxer or football player is assumed to have accumulated injuries that make them a worse value proposition. Are devs the same? Am I slowly accumulating the equivalent of career ending sports injuries the longer I am stuck in a job living like a Dilbert comic?

Older mathematicians are famously less effective. I honestly feel like I'm less good at my job than when I started. Certainly experience with outdated tools/paradigms seems like a net negative - it will mislead you when working with modern tools/paradigms.