The point is that your finding it hard to believe that someone feels a particular way is very poor evidence that they do not feel that way, especially when applied to a population.
We know that longtime meditators are able to distinguish micro-expressions in others that reveal emotions that they might not even realize they are having. And they are experts in identifying their own emotions as well. Do you have any such qualifications?
If not, then your disbelief in other people's claims about their experience is likely much stronger evidence of your own difficulty empathizing.