Privilege vs Right

I’ve the following paragraph

All comments are screened for appropriateness. Commenting is a privilege, not a right. Good comments will be cherished, bad comments will be deleted.

Could anyone enlighten me what difference is between Privilege and Right, please? I’d be grateful.

KK

privilege
[countable] a special advantage that is given only to one person or group of people. ldoceonline.com/dictionary/privilege_1

right
[countable] something that you are morally, legally, or officially allowed to do or have. ldoceonline.com/dictionary/right_4

It’s crystal clear! Thank you!