Could you have made $2700 in 2018 out of $1500 in 2013 easily by investing in an index? Yes.
Could Michael Dell have used the exact same method to make $27B in 2018 out of $15B in 2013 by investing in an index, without changing the conditions of that index such that the method wouldn't work? Yes.
You seem to now be focusing on the question "Is Michael Dell a stupid dumb idiot or a saint?"
These are the questions:
Could you have made $2700 in 2018 out of $1500 in 2013 easily by investing in an index? Yes.
Could Michael Dell have used the exact same method to make $27B in 2018 out of $15B in 2013 by investing in an index, without changing the conditions of that index such that the method wouldn't work? Yes.
You seem to now be focusing on the question "Is Michael Dell a stupid dumb idiot or a saint?"