If you are confident they will maintain appearances, go for it. My personal objection is if one slows pace of play by removing and replacing he cover
My opinion is clubs are tools, not jewels. Just about all my marks on my clubs are from use., not rattling in the bag. Whatever you are comfortable

You don't need to, BUT if you want to keep them looking as nice as possible - for as long as possible, go for it.
There used to be some stigma around using iron covers, likely from snobby purist, but I've found most people really don't care.
I've been rocking them for the last year and nobody has given me a hard time about it. Hell, if I'm spending $1500 on irons, I want to preserve them as long as possible.
Sure, they're "tools, no jewels", but whatever. Do what you want and if someone wants to have a pissy attitude about it, that's on them.