If it benefits you more than 1%, then you're in profit.
Of course, if you're in a job that doesn't actually care about performance, and performing won't lead to better salary at some point, then it may not matter.
I get making economic/stats based analysis like this, but is your boss going to notice that 1% to give you a raise they otherwise wouldn’t? Probably not…
Your company culture can be performance-minded and this still be true.
The real problem however is, I cannot simply share my employer's repos to be absorbed by any LLM out there. So I use only the tools that my employer provides and approves of. Currently that is Microsoft Copilot chat/RAG via my work account. It takes some copy/paste and adaptations of problems/solutions but it is much more efficient than using SO. It is also a great teacher that never gets tired of my plenty why/how questions.
In my view, the future is that LLMs can train on entire private code repos until it understands its ins and outs. Currently it would need to fit in the context window, hence you need to babyspoon it, as I understand things.