Your response assumes a lot about the homogeneity of subjective human experience that the data don’t seem to support.
There is a diversity of physical attractiveness, innate and learned social grace, social environment, and phenotypic variability in psychosocial capacity that makes your comment sound extremely out of touch to some people.
I can do what you describe because I am fortunate that many of my social interactions are positive. For people I work with this is not the case and they are extremely socially isolated, and the tragedy is that every mistake they make compounds this. They are more sensitive interpersonally than I am and more socially aware in the moment, while less equipped to deal with social conventions and unattractive, becoming dramatically moreso in social situations due to their intrinsic reactions.
The points in the article can help all of us.
> and the tragedy is that every mistake they make compounds this
This is correct and I'm convinced there comes a point where there's no way out. The vast majority of social experiences in my life have been negative and it gets worse every time I have another, making it less likely the next will be positive.
Rather than continue to get hurt I have nearly 100% socially isolated myself, save for the internet. I work remote in a rural area and I only leave the house for essentials. There's no place for me socially and I've accepted that.
> There is a diversity of physical attractiveness, innate and learned social grace, social environment, and phenotypic variability in psychosocial capacity
I say this with respect: the kind of attitude you're describing does more to isolate people than anything mentioned in the original post.
Bitterness or even just muted disappointment will drive people away more than any of the factors you mentioned, by a factor of 10. Have any of you gone on a date with someone who looked great on paper, but seemed unhappy to be there or resentful towards you? That's the ultimate connection killer.
You can have all sorts of setbacks, but if you're chill and have a good attitude people will want you around (barring a few assholes, but it's important not to worry about them). OTOH even if you're very good looking, no one will want to approach you if your vibes are bad or inward facing.
The point is that a fully grown person (i.e. adult) should be able to regulate their emotions to the point of being able to have a conversation with 3 strangers.
You might not like it, it might stress you out a bunch, you can cry afterwards, or have a stiff drink after, but you should be able to set those emotions aside for 30 minutes, especially for something important like a job interview.
If someone cannot do that, they should definitely go into therapy for that. No matter if it was 'done to them', it's still a problem that person carries around, and the only way around that is fixing it.