There are important lessons to be learned from struggling- things that will help Gracie, Starr, etc. become better skaters.
Gracie had a TES of 13. That's just slightly over half of the minimum required technical score for the Grand Prix. Yes I know that she "earned" it but I think given her struggles in the past this might backfire.
https://en.wikipedia.org/wiki/2018–19_ISU_Grand_Prix_of_Figure_Skating#Requirements
However reading into the comeback clause more closely it suggests that if she didn't use it this year then that opportunity would have been gone forever since her previous results would have expired. This was probably Polina's rationale as well.
"A Skater or Couple, not included among those defined in paragraphs a) and b) above, who was previously
in the top 7 to 12 at the ISU World Figure Skating Championships 2016 or 2017 but since was injured
and/or did not compete at all during the entire 2017/18 season, may be chosen, if applicable, as an
Organizing ISU Member Skater, and in addition, may be considered as an Organizing ISU Member’s
Choice and will be ranked in the list of Season’s Best scores by taking the Season’s Best points of their
most recent season, if proof is given in writing by their ISU Member that they intend to continue their
competitive career and their return is announced and confirmed by the date of the annual Selection
Meeting. Such Skater or Couple is defined as a “Return Skater/Couple” and such a Return Skater/Couple
does not need to fulfill the requirement of a minimum Grand Prix score.
https://isu.org/docman-documents-li...98-gp-general-announcement-2018-19-final/file