In a word – no.
Not all of us have the same capacity, physically or otherwise, to excel in every occupation. And what's worse is most of us don't even try.
Take, for instance, this new word I learned today – fatphobia. Fatphobia is supposedly the discrimination against fat people by those of us that have "thin privilege." Yes, it is now considered a privilege if you are in shape. Oh and if you don't think airlines should remove weight restrictions, then you're just a disgusting "sizeist" who's perpetrating this "mainstream" delusion. And pro-fat idiots take it further by bashing on the medical community for painting obesity in an unhealthy light. The truth is that there is no such thing as "fatphobia." If I see a person who's so fat that they have trouble walking up a flight of stairs, of course I'll think they're unhealthy, and rightfully so. Pro-fat people are too often fatasses that live in a bubble and can't take responsibility for their unhealthy eating habits. Put down the burger, get on a treadmill, and maybe, just maybe, take responsibility for once in your life.
Moving on, it's pretty much the motto of feely types that we are all perfect angels that are equally capable of everything.
Um, no.
Most people out there are lazy, they do not seek to improve themselves, and spend their days bashing on those of us that do. If you have even the slightest interest in art, culture and anything academic, you will be called out as a hipster by the masses, especially the older illiterates that refuse to accept that their prime has come and gone.
A big factor to be considered is personality. Yes, all of us are unique blah blah blah. But our general personality can still be classified into cardinal units. My point is that our personality plays a large part in our capability in performing certain tasks. Being introverted, it is easier for me to remain for long periods without social contact than it would be for an extrovert. An introvert can become more extroverted and vice-versa, but their default is either one or the other. Taking the personality factor further, we can deduce that a more logical person will be able to perform calculations and conceive strategies better than a sensitive type.
Our personal experiences also shape us. Some of us may not have a high IQ or a perfect body, but because we are more determined, we work hard and at the end of the day, we achieve results. Conversely, others are so privileged and out of touch with reality (lol "fatphobia") that they lead their entire lives in mediocrity (and complain about it afterwards). What we should do is analyse our strengths and weaknesses and measure them against our goals in life. This way we can minimize our weakness and maximize our strength. But before we can do any of this, we have to be blunt and admit that we are not all equal.