Well 'it' may require a little thinking, but when taken in the context of the other option 'allow me to decide' and the fact that the CyberCapture function is enabled, otherwise these two options wouldn't even be displayed.
If the user clicks the ? help function key from the main settings screen, expand the 'Main' section, they will get essentially what you have said. One thing that avast have to think about is the various languages that have to be translated and how long they might be.
Enable CyberCapture - Detects and analyzes rare, suspicious files. If you attempt to run such a file, CyberCapture locks the file from your PC and sends it to the Avast Threat Labs where it's analyzed in a safe, virtual environment. You are notified when the analysis is complete. CyberCapture and the setting Always block suspicious files are enabled by default. We recommend to keep the default settings, unless you are aware of potential risks.
The above may differ from the above as I don't have the beta on this win10 laptop, but the regular release versions of avast.