Let’s say you are a beginner programmer and good with excel. If you are now doing a lot of excel jobs (and your manager agrees that you should do it) then you progress at excel and less at programming. So your buddies might get promoted to senior programmers while you stay the underpaid excel guy.
You should make sure that you get extra education to catch-up if people ask you to spend time on dead ends.
If you leverage your position as a point person well, you can find a lot of collaboration opportunities and expand your knowledge-base quite efficiently.
It’s one of those warning signs about an organization. When you’re collaborating with fellow engineers, it’s a completely different dynamic.
Demand favors in return. You only turn into the lowly Excel donkey if you let people milk the cow for free.
I have some high level expertise in an obscure system that has a problem once in awhile. The owners know that I will help them, but that someday I will also need a favor in return. It keeps everybody honest.
If they don’t have anything you want, say no.
You _can_ try to get favors back, but becoming a go-to for Excel means you'll spend more time on that skill and less on others, like software development. If you want favors, be a go-to; if you want to get better skills, don't advertise other skills.