It was very clarifying. Thank you all!

So, as an example, to transfer small ammount of ETH to a Metamask just to farm some possible airdrops using Arbitrum sounds like a better option. In this specific case, I intent to use it on Scroll (not sure if it is a good choice for airdrop farming, but this is discussion for another topic, I guess), so I would have to withdraw to Arbitrum Network and bridge it to scroll somehow (maybe Orbiter?)