The question to always ask in this type of situation is: What has the “yichus-blessed” individual achieved in their life besides being born from the right womb?
Yichus is NOT a proxy for one’s own accomplishments.
You may well find that there is an inverse correlation between the degree of yichus obsession and actual accomplishments!
I have a sister-in-law who is a great-granddaughter (different surname) of one of the gedolim of the last generation. When going out with my brother-in-law, she never mentioned her lineage! In fact, we found out (in passing) from a third party. That’s genuine yichus and more importantly CLASS!