@Finn dAbuzz,
I have to censure myself completely on social media due to my job.
There's no way many of us could share political or social views at our job without losing the job.
Many times, it would be totally inappropriate to share views for a myriad of reasons.
In the case of multimillionaire professional athletes, they have leverage and money to fall back on if they lose their jobs.
It's still a risk, but not as drastic as it would be for most of us.
Free speech doesn't mean there are associated consequences. Your employer is often protected by a contract.