That is mostly true. It will show just how little is generated off of CPU. For someone totally new to mining it will offer some context around the basics of what is a hashrate, etc. Also, it will cause a new person to get into needed to create a wallet separate from an exchange perhaps for the first time to transfer to, consider how they want to secure said wallet, etc. There are some nuts and bolts around crypto that if so far Coinbase is your experience messing with this extension will help someone move beyond before spending $$$ on graphics cards. At least I hope that is the case.