Fact is, you can go right down that roster and look at the numbers those players had before arriving at Duke and they are worse.
Your assertion doesn't stand up to inspection. Duke starts three transfer students. And all three have improved their offensive efficiency during their time at Duke. The fact is that none of them were accomplished scorers before they got to Duke. As such it is not surprising that they haven't become scorers for the Blue Devils. But all three have improved their FG% at Duke.
If you played college ball then you should be well aware that players don't have their offensive games overhauled at that level. Players tend to improve as their confidence and understanding on the floor grows. These players were starters before getting to Duke so they already made that jump prior to arriving in Durham. Players can also fine-tune their games in the offseason. But most of that involves tweaks, lots of practice and improved conditioning. Most importantly, the players have to commit to putting in that work to get better. Celeste Taylor and Elizabeth Balogun are very good college basketball players but neither has shown the capacity to regularly carry their team offensively. Kennedy Brown, in turn, has suffered an ACL injury at Oregon State and is probably never going to be a dominant post player.
After three years Kara Lawson has turned Duke into a top 5 destination for recruits. If, in spite of that, the Blue Devils' offensive woes continue into future seasons then the criticism will rightfully get louder. For the moment though, I don't think that it is quite fair to call her out for not being a shot whisperer.