Don't ban Iron Bomber my peoples have gone through enough hardship as it is.
For real though it very much is a sidegrade, a very strong one but yeah. Process and Sunshine come to mind most as Eemes, Hellbent and Doughy have pointed out, but even still I think stock grenades are also good on Gully mid. Others have also brought up Loch n Load, which I think is super strong to run to certain mids. Loose Cannon is really good on some lasts.
I'd say Iron Bomber definitely makes stuff more fun/easier for the Demo, for example jumping up to spire without detting your trap in main on Badlands 2nd. This is probably why a lot of people just leave it on without swapping weapons around too much, which is fair.
- Dr. Mak, PhD in Iron Bombing, leader of the Iron Bomber Research Facility