No basis?
The difference in scoring of an average game is 68 in college and 114 in the NBA.
With all due respect, the fact that you think this substantiates your take proves the point that there is no basis.
Even if you limit your college basketball sample to NCAA Division 1, there are 352 teams. If they each use all 13 scholarships, that is 4,576 players, not including walk ons. That is a spectrum of age from ~17 to ~23 and experience from 1st year to 5th year players. As
@the moops pointed out, the average college basketball player is not nearly as good offensively as the average NBA player... it isn't remotely close, so comparing game scores doesn't make sense.
On top of that, it has already been pointed out that rules favor offense more heavily in the NBA, and you admit the difference is enormous. Yet you seem to ignore that difference by comparing college and NBA game scores.
It has also been pointed out that the games are longer. And there is a 24 second shot clock in the NBA, compared to a 30 second shot clock in college. Both of things drive more possessions and more points.
Most importantly, I challenge you to watch some of the ongoing NBA playoff games and report back that you still believe college basketball players are better defensively.