Not saying Wilt would have won more titles in today's NBA, but there was no free agency in Wilt's day and no limits on a teams payroll. There was one team, the Celtics, so far ahead of all other NBA front offices in acquiring NBA talent that the Celtics stacked their roster, and the players could not leave unless and until the Celtics didn't want them any more. That can't happen any more. Teams can't keep that many elite players together for a decade. So, really deceiving to say "Wilt only won two titles" in that environment.
Wilt played in the NBA from the 1959 season until the 1973. Over those 15 seasons, the Celtics won 10 titles. Wilt won two (1967 and 1972); Knicks won two (Willis Reed and Clyde); Bucks won one (Kareem), and the Bullets won one (Wes Unseld and Elvin Hayes).