No profession has people that are created "equal".
There will always be those that are a cut above the rest.
A basketball player could shoot 1000 shots a day and never become the next Michael Jordan.
Some people have more natural talent than others.
I do believe anyone can learn to be proficient.
A person with drive, ambition, determination and a strong work ethic will often oututperform those with natural talent who choose to coast along.