If you already have a cold wallet, what exactly is the use case of a dedicated crypto laptop? To open few websites ?

Hi guys, is there any actual purpose of having a dedicated crypto laptop with a better Unix based OS like Linux/ChromeOS or MacOS?

What's the actual use case? - to open kraken and binance in a web browser? (that can also be done safely in Windows) - when making crypto transfers to and from cold wallet to be less worried about having a key logger on your windows system or a malware that can change(paste another) crypto address? I mean even if I have a keylogger how does this affect my security, perhaps only when I enter the 2fa code on a crypto exchange they can use the same key within the next 30 seconds?