Head hunting interview:

Q: Are your front end dev?
A: Yup, I'm website's frontend developer.
Q: Are you good at AngularJS?
A: No, I'm not. I only know Reactjs, and Ember.
Q: How about backend, you said you know Rail?
A: Yes, maybe for 3 month experience.

Q: So we need Angular guy, but it seem that you are BAD at Angular. Can you JOIN our next interview?
A: Sorry. I already told you that I don't care about Angular. Isn't it totally different with BAD at Angular? Thank for your consideration. I'm out.

Is there any double standard such as without AngularJS you will be considered that you are terrible at AngularJS?