I have no idea why they are calling it a “Disk Analyzer” when it is clearly a Duplicate File Finder.
NO - It is not safe just to delete everything that it has found as duplicates.
The Windows system and some applications NEED duplicates in different folder to work properly.
If you delete those duplicates, particularly if you delete the System duplicates, then things will stop working properly.
To start with I strongly suggest that you leave “Other duplicates” (Autres doublons) well alone, only delete duplicates of your own files, images, documents, etc.
The Duplicate Finder in previous CCleaner versions always had an option to ‘Ignore’ duplicate system files - That option has been missed from CCleaner 7.
In my opinion that omission, particularly in combination with the new mass-removal button, makes it a dangerous thing to use in CCleaner 7.
Personally, as that tool stands then I would not let it delete anything.