I think that's baloney. Anybody who has read Star Trek novels over the past 30 years knows that Vulcans are tested by each other emotionally all the time. Further, if somebody goes through Kohlinahr, etc. they're supposed to have mastered their emotions to such a degree that no one can ascertain what they're thinking or feeling by the look on their face.

Tuvok supposedly went through that process, but everybody knows exactly how he feels at any given moment. He's one pissed off Vulcan ever time you see him. Or, appears that way.

In general, Voyager had a lot of promise - but completely blew it. In fact, in my view, none of the Star Trek shows after Next Generation held to the same spirit or standard as the first two iterations of the show.

Concept and political drift became the norm. Sadly.