Indeed , it boils down to the public image and perception
It's better to get rid of a potential 'problem' , before that problem forces you into a flurry of damage limitation .
The companies are in the business of selling sports products and motors to Joe public .
If keeping her on is going to mean there is a drop off in joe public buying their goods and therefore an adverse effect on their bottom line , then they will ( as they have done ) drop her like a hot potatoe.
Privately , the executives / shareholders of these companies , have probably got sympathy for her , but dollars overides any loyalty here .