Potentially, but it's a bit of a different situation. PIC using Janeway locks Janeway into a future fate while the PRO writers are still making major decisions on what she's doing back in the post-NEM era. But PRO touching on Seven would just be filling in her backstory.
But it might also mean restricting the creative choices of the creators of any future live-action show starring Seven, which Kurtzman might want to avoid. Easiest way to avoid that potential problem is for Seven to just not play a role in
Prodigy.
Stewart's involvement wasn't enough to get Picard into the Top 10 streaming shows before S3 - the reunion of all the cast seems to have contributed though.
Sure, but StarMan never claimed Stewart's involvement was enough to get
Picard into the top 10 streaming shows before S3. He's saying that he questions whether or not the audience would be sufficiently interested in a show without Stewart's involvement as to sustain an audience even without making it into the Top 10.
I don't agree that Jeri Ryan isn't a big enough name to lead a show, but let's address the argument he's
actually making.
Certainly Jeri Ryan and Seven are big draws for a lot of people - I'm just not sure you can say that a show needs some star power alone to make it a success. Strange New Worlds seems to be doing fine, and they don't even have a Jeri Ryan.
In fairness,
Strange New Worlds also has the selling point of Anson Mount, et al having starred in
Discovery Season Two and the return of Mister Spock -- a pop icon on a scale no other
Star Trek character has ever reached, not even Picard or Seven. But I do broadly agree that
Strange New Worlds indicates the audience is open to a cast of mostly-unknowns more than not.
One other challenge for a potential Seven-led spinoff: a segment of Seven "fans" have been treating the character and the actor as a sex object rather than seeing her as a leader for twenty-five years. But I do think that Ryan's fanbase is large enough, her star power and leadership strong enough, and that the misogynists are a small enough percentage, that she can overcome that and lead a spinoff.