Obviously if your skills aren't relevant, they aren't going to be used.

IMHO, this is mostly due to the nature of the industry I am in (software). Hiring engineers is difficult, and only done when there are specific needs to fill - particularly at small companies, that can't afford to think too far ahead, or afield.

I was asking if you've found your other skills ignored even when you could explain to the company how they're relevant for them. For example, if you can do accounting, and you're applying to work at a company like Tally that makes accounting software, and you explain to them how your accounting skills are an added reason to hire you, have they, in your experience, still ignored those skills?

Yes.