This is called anchoring effect, a psychological bias.
Anchoring effect is something related but subltley different: https://en.m.wikipedia.org/wiki/Anchoring_effect
https://www.wikipedia.org/wiki/List_of_cognitive_biases#Anch...
and follow the first link labeled
Main article: Anchoring (cognitive bias)
Actually, you may also read the first link you sent and be equally surprised:
Anchoring bias (also known as anchoring heuristic or anchoring effect)
This is called anchoring effect, a psychological bias.