IMO you have to look at more than just national championships. Under Calhoun they came a lot closer. Especially from 1990 to when Clahoun retired, they were almost a lock for the NCAAT (75-80% ish), finished 1st or 2nd 12 times in conference, and 13 second weekend appearance or later, and 3 championships.
But under the last two coaches, 11 years, UCONN has made the NCAAT just 5 times. 2 championships, 1 round of 32, and 2 rounds of 64. They also haven't finished higher than 3rd in their conference over that time period, and winning just 56% of their conference games. The championships are great, but it's about the only thing that would have them in the conversation IMO.
To Compare, Duke under K missed just 2 NCAATs from 83 with 26 second weekend or better trips and finished 1st or second 25 times over that span.
In 17 years under Williams, UNC missed 2 NCAATs had 10 second weekend or better appearances, and finished 1st or second 10 times. There was a three year gap with Doherty that was bad, but that was 3 years out of about the last 50. Guthridge finished 2nd 3rd 3rd and had 2 final fours. You can imagine what Smith's numbers would look like.
Kansas hasn't missed an NCAAT since 89, finished lower than second in conference just 3 times in that time period, two of those being 3rd place finishes, and has something like 19 second weekend trips. And really that streak pretty much goes back to the early 80s with Larry Brown and prior to that things were different with how the NCAAT was treated.
Kentucky is the most turbulent. In 14 years under Cal they've missed the NCAAT just twice, finished 1st or second in conference 11 times, and have 8 second weekend trips. Gillespi was two years of nothingness (although they did make the NCAAT one of those years). 10 years under Tubby, they never missed the NCAAT, finished 1st or 2nd 7 times, and 6 second weekend trips. Pitino was more of the same, only missing the NCAA twice in 8 years because of not being eligible, although probably would have missed it in year one anyways, and being dominant the last 6. Sutton was there for 4 years, 3 NCAAT two 1st place finishes in conference and 2 second weekend trips, and got out before the executioner for his cheating. Before that was Hall and Rupp and you can guess the story.
Yes, the championships are nice, and had they continued to be what they were under Calhoun in terms of year in year out, but compared to the other blue bloods they've missed more NCAATs in the last 11 years than most of them have since going back to the 80s. And the lack of success in conference regular season is really a stark contrast to the others.
To me it's like the difference between Rich, and what the *** Rich. For instance, Michael Jordan is rich by almost any metric. But he isn't particularly close to guys like Musk, Bezos, Buffet, and Gates.