Link?
If 6-8 Big Ten teams went to the dance every year in the history of the Gopher program your argument might hold water. As it is, it has no bearing.
BTW Tubby is 37-47 in Big Ten play.
Actually, it holds quite a lot of water. If you go by modern standards (i.e., finishing with a good overall record and being at or above .500 in conference play), Gopher coaches since 1939 would've had the following resume (records since 1985 are actual and not hypothetical due to the tournament expanding to 64 teams in 1985):
Tubby Smith - 2 in 5 seasons (presumed) (.400)
Jim Molinari - 0 in 1 season (.000)
Dan Monson - 1 in 8 seasons (.125)
Clem Haskins - 2 in 13 seasons (.154)
Jimmy Williams - 0 in 1 seasons (.000)
Jim Dutcher - 5 in 11 seasons (.455) - (1978, 1980-83)
Bill Musselman - 3 in 4 seasons (.750) - (1972, 1973, 1975)
George Hanson - 0 in 1 season (.000)
Bill Fitch - 0 in 2 seasons (.000)
John Kundla - 2 in 9 seasons (.222) - (1964, 1965)
Ozzie Cowles - 6 in 11 seasons (.545) - (1949, 1952-55, 1957)
Dave McMillan - 4 in 7 seasons (.571) - (1939, 1942, 1946, 1947)
Weston Mitchell - 0 in 1 season (.000)
Carl Nordy - 0 in 2 seasons (.000)
Since the NCAA Tournament began in 1939, there have been 14 Gophers interim and full-time head coaches. Of those 14, Tubby ranks 5th in frequency of real/hypothetical tournament appearances behind Musselman, McMillan, Cowles, and Dutcher. Since Musselman and Dutcher were both cheaters, they shouldn't count. Thus, by frequency of real/hypothetical tournament appearances, Tubby is 3rd all-time, and is one of the best Gophers coaches ever, by default, just as I stated.