Seeing you get downvoted, I don't get it. Why would professionals not want to spend a week to learn something which you can build knowledge on for the next few

Seeing you get downvoted, I don't get it. Why would professionals not want to spend a week to learn something which you can build knowledge on for the next few decades, especially when it has monetary value? There's an aggressive/paradoxical luddism in tech that I'll never understand, considering that it is the tech industry. How many great tools/frameworks have come out over the past decade and how limited would you be if you ignored it all?