At my speed, I might as well play a 2 iron instead of a 4 iron. Neither will get enough launch to get enough distance. I use a 7 wood.
Do you get 10-15 yards consistently more than a 5 iron?
Will an approach shot with the 4 iron more likely to roll off the back of the green?
A 7 Wood should be more consistent with distance and launch higher to land softer on greens. When a tool doesn’t do the right job, time to consider a new tool. The right tool might be a driving iron, hybrid, or fairway. Depends on the task you want it to do.