Agreed. I use a mobile wallet for a few hundred dollars worth of bitcoin, which I carry around daily. I know it is far from being secure, but it's an amount I can easily afford to lose and an amount I would happily give to an attacker to prevent any physical harm to myself. The amount in that wallet is in no way linked to my main cold storage via blockchain analysis. My various cold storage wallets are also in no way linked, are of various types (hardware, paper, old laptop which has been airgapped), and are all stored separately.
I don't even know how much is in my cold storage as I haven't accessed it in a number of years. Although, I don't actually own a mobile wallet due to my precautions when dealing with anything mobile. I do have a wallet which stores a few hundred stored on my a computer which isn't regularly accessed. I'm not the type of Bitcoin fanatic which trades or sends transactions regularly though.