No, guys like El-Amin, Lane, Bell, Althoff, Horvath, Gilbert, Taylor, Taylor, Aldrich, Leuer, etc all went elsewhere.
Johnson, Boone, Ohnstad, McKenzie, and Mbakwe went elsewhere and then transferred back. Hargrow came here, left, and came back. Schilling, Coleman, and White came here and then transferred. Rickert and Humphries committed elsewhere before eventually signing here.
We have never locked down the border in the past 25 years. If we had Gopherhole in 1998 people would have been melting down (and this the year after we made the Final Four).
Also contributing is Minnesota used to produce a quality player every couple years, then eventually a couple every year, and now we pump out a bunch of guys so every year there are bound to be more misses just on sheer numbers.