Sauron wasn’t afraid of Shelob. She was a convenient guardian of the mountain pass. Sauron even sent her some prisoners as a form of execution.
Anon was thinking of Melkor and Ungoliant. Melkor really was afraid of Ungoliant. If Ungoliant’s insatiable need to consume didn’t result in her consuming herself, she would have been 1000x more dangerous and powerful than Sauron by the 3rd age.
A Silmarillion enthusiast in the wild!
If memory serves, it’s been a while, she became endlessly insatiable after consuming the two trees upon Melkor’s behest.
It took lashes of fire from the Balrogs to free him from her, since she wanted to consume the Silmarils as well and attacked him for them.
Ya, I think that’s the right of it.
In Deep Greek did a video on Ungoliant