Especially in large organizations, you'll typically end up with more interesting/rewarding work if you help define it, than if you wait until something is handed to you.
Can confirm. Made a bit of a leftfield suggestion for an issue that there were no truly good solutions proposed for. I was tasked with building and deploying it. It's in production and working well so far (service which is 90% of our egress bandwidth). Got some really nice feedback from the director of technology at the Christmas social event.
I can't imagine that it's hurt my job security, and it's been far more interesting than waiting for someone to find me busywork to do.
Or maybe you get to work on this important new thing, instead of whatever dumb thing you were going to be stuck doing.
Yeah, I've used this to my advantage: Sell my boss on the idea that we had a real problem and I could address it instead of doing some other lower-value tasks; essentially re-shaping my own role into something that I found much more fulfilling and resume-enhancing than whatever I'd be doing otherwise.