Perhaps ... but consider this: Diana Muhldar, who played Dr. Kate Pulaski on TNG used Cue Cards on the show, almost exclusively, during her stay.
Jonathan Frakes' wife Genie starred in "soaps" for years, where they use cue cards, regularly. SNL uses cue cards, extensively, in its skits. Also, the way the coverage is broken up, even on VOYAGER, allows for their use ...
Cue Cards also do much to encourage stilted performances, I'm not suggesting that they're used heavily, throughout STAR TREK. But they've certainly been used!
Jonathan Frakes' wife Genie starred in "soaps" for years, where they use cue cards, regularly. SNL uses cue cards, extensively, in its skits. Also, the way the coverage is broken up, even on VOYAGER, allows for their use ...
Cue Cards also do much to encourage stilted performances, I'm not suggesting that they're used heavily, throughout STAR TREK. But they've certainly been used!