Teams that instead of fixing their main product, go off and create even larger products that don't have immediate revenue streams do little to "ship new product

Teams that instead of fixing their main product, go off and create even larger products that don't have immediate revenue streams do little to "ship new products faster" or help the bottom line. This is going to be down voted, but if I were running a software dev team charged with producing X and they spent all their time doing Y because they "need" a new tool I would question their value. Particularly if all the competitors are kicking our butts, and don't seem to need said tool. So, rust is great and all, but is mozilla really the org that needs to ground up create a new langage/ecosystem? Outside of the tiny developer community using rust, what does it bring to the end users of firefox (you know the other few billion people on the planet who aren't developers) that couldn't have been done with just spending the time to fix compiler warnings/errors and enable some basic code analysis/linter functionality on the existing code base? (which yes, I've fixed some bugs in firefox, its a giant mess, every time a new GCC comes out, firefox needs to have bugs patched just to run).