It might be clear headed in tone but the argument is fundamentally absurd.

People are different. People have different preferences. Everyone’s mind works in different ways. Any argument that can be summed up as “you’re just no trying hard enough” is fundamentally unsound, unhealthy, unhelpful and entirely disrespectful.

I'm not sure, I think there is value in pushing through friction regardless of if you are introverted or not. One thing that is common to all humans is that loneliness correlates strongly with lack of satisfaction in life and being less healthy.

Before we talked as much about introversion and extroversion, people felt more obligated to do certain social events that they can more easily reject nowadays. That does mean it was uncomfortable and they had to push through friction because it's draining for introverts to do social events but being there also helped with making group of friends and staving loneliness. I do think this change in mores is one of the factors that contributes to the so called loneliness epidemics nowadays.

People may be different, but that doesn’t mean we should accept it all the time.

I hate exercise. Like I really really really hate it.

Should I just accept this and live a life without it?

I don’t think it’s such a stretch to say that socialisation is similar.