Let me lay the facts out for you, your friend seems to have a biased opinion, joking, or have zero clues about football.
#1 - Deion Sanders did not give up a touchdown for 3 years
#2 - His playstyle was aggressive in a way that he'd bait QBs into making bad decisions by faking getting beaten on a route, only to 99 dash to pick balls.
#3 - This goes with #2, but he was so good he had to pretend not covering someone to have a ball thrown his way
He had amazing coverage skills, insanely athletic, physical but didn't commit half the time (for tackling)
2/3rds of the earth is water, and the other third is Deion "Primetime" Sanders