I don't have Smith in my top 10, but at least I get the argument here. If it's a list of the "most important" UConn players, he's on it, along with Corny for exactly the reason mentioned in your first sentence.
And yes, he is the all-time scorer (although Hanson had 62 more buckets - no 3pt line - and a 7% higher make rate). But I have a hard time knocking off anyone mentioned on SI's list to include him. He reliably put up numbers, yet I don't recall a "Chris Smith moment" in a huge game. Maybe if he took the shot vs Clemson instead of Tate.
It's a good reminder to take another look at
Basketball-Reference's UConn records page. Especially for the folks who don't think Bazz deserves a spot on the top 10. Hell, spend enough time on that page and you might convince yourself that Vital belongs.