I completely agree. Advanced users should be able to disable any hints. Why do they need them? For example, we have been using ESET products for over 10 years. We already know how and what works. If needed there is a FAQ on the site. For home users, you can leave hints as some of them really noobs
For visual perception, it is better to use blue progress bar like in EES v5 when scan something.
PS: The hint appears not only in the scan window, but also in LiveGrid settings.