That's the strong Sapir-Whorf hypothesis and it's not been a serious linguistic theory for nearly about a century now. It's not a concern.
You might have been thinking about the weak Sapir-Whorf hypothesis, which is about the much more reasonable idea that linguistic structure merely influences thoughts and decisions. Except that it's such an obvious no-brainer, it's hardly worth mentioning. Also it makes it quite a leap to go from there to being unable to feel your own feelings (again, instead of influencing ones feelings).
(see https://en.wikipedia.org/wiki/Linguistic_relativity )
On the other hand, speaking about being genuine: I personally believe that being PC is about being sensitive and aware of other people's feelings, to genuinely spend the effort to understand why or why not something would be offensive to people. And with understanding, you'll find that your language changes (just like it changes when you become friends with someone). That is really taking the substance over just the style.
And personally, I have found that cultivating this awareness in myself has allowed me to actually think MORE thoughts, and feel MORE feelings. Claiming it does the opposite is not helping. This is a matter of feeling comfortable with the other person's feelings, not about yourself.
I'm not making some mental leap. I'm describing first-hand experience of things I've had to overcome.
Your experience of life doesn't negate my experience of life.
Are you saying that you're incapable of non-narrative thoughts?
It's a bit like that.
I mostly don't suffer from this issue. It's a genuine concern that if you can't speak certain words, then you can't think certain thoughts and you may not be able to feel your own feelings.
I spent a lot of time in therapy. I feel fairly comfortable with myself.
It's a topic I should perhaps explore more sometime, but I have had a really rough month, I'm still exhausted and I've got a looming deadline, so now is not the time for that.