Yes more people and media may be at Hillary’s rallies.
But whatever she says to persuade voters, will be overshadowed by her appearance and demeanor. There will be less attention paid to the message she wants to get out there, compared to whether or not she appears to be somewhat healthy. Every cough or surpressed cough or facial grimace will be scrutinized. How she walks on and off stage will be scrutinized.
I think the point was people will be watching to see ‘the moment’ when she falls on her face or maybe dies on stage.