Your premise that guys like this don't exist is just not true. I had this guy
graduate last year. Against a top 40 SOS, he scored 25.2 ppg (led the country) on slightly over 50% shooting (I didn't keep his shooting % numbers, but I am pretty sure it was about 51.5%). On this team, there were 3 freshmen starters, so definitely not a great supporting cast, and we went 23-7, won our division in the ACC, and went to the 2nd round of the NT. He was 1st-team all-american. He was dominant for a team starting 3 freshmen, so I'm sure he was getting doubled every single game and still managed to lead a mediocre supporting cast to a 2nd round NT appearance (I was an 8 seed). I'd say he was pretty damn effective.