> Surely making use of a new tool that makes you more productive would increase your value rather than decreasing it?

Think wider. You, sharperguy, are not and will not the only person with access to these tools. Therefore, your productivity increase will likely be the same as everyone else's. If you are as good as everyone else, why would YOU get paid more? Have you ever seen a significant number of companies outside FAANG permanently boost everyone's salary just because they they did well on a given year?

A company's goal is to the shareholders not to you. Your value exists relative to that of others.