That's probably debatable, if they have permission. They probably shouldn't have been given permission, but that's a separate issue

le·git·i·mate adjective /ləˈjidəmət/

1. conforming to the law or to rules.

"Do what thou wilt shall be the whole of the law" - Aleister Crowley

seems legit to me…

That's the definition of a legitimate use.

Cloning keycards temporarily with permission (until new ones are made.) Breaking into your own or a friend's car because the keys were left inside (until you get the keys back)

Cloning a TV remote just to lower the volume to a sane degree and turn it off (until they get a new TV, remote or find the old one).

Legitimate is a anything that you're allowed to do. It's a simple process to test legitimacy:

Did someone ask you if you can help?

If yes, did you tell them what you'd do?

If yes, did they agree?

And once you did whatever it was they agreed to, did you keep your ability to do the same thing in the aim of doing something they didn't consent to (once you cloned their car key, do you plan on stealing the car? Or once you cloned their remote, do you have an insatiable urge to fuck with them by abusing the remote?)

If you answer "yes" to all except the last one, the use is legitimate in 99.9% of cases.

The only reason this may be considered a non-legitimate use would be if you attached the exclusive economic right of making repairs or new keys to the OEM, which isn't how a sane world works.

And besides, tools like the Flipper truly are hacking tools. Today hacking has a bad rep, and the word used to mean more like hack something together.

Imagine Bob who is a DIY type of guy. His TV starts falling apart because the plastic casing broke. Bob takes some duct tape and glues the casing together. As the TV stand is also a bit wonky, he takes some screws as well just to be safe. He doesn't plan on keeping it for too long, just until he can find a fitting replacement that's not too expensive. Most likely, he's bound to keep it until the next Black Friday.

Bob just successfully hacked something up to keep his TV from falling apart.

That's the origin of the word "hacking". "To hack up" got shortened by attaching a new meaning to the verb, without bothering with the entire phrase, and making it relate only to electronic/digital hacking. So the TV example isn't hacking, but it is hacking up. It means "to make some temporary fix until a proper one isn't found".

Today, hacking has been conflated with exploiting and breaking digital locks, which is not what the original phrase meant.

I would let all the power go to my head with that one. Not that I go outside, let alone to bars.

The physical IRL location where I show up to play Dungeons n Dragons, and not in game. DM's got a robot vacuum.