In the EU, it's very hard to lose the job. It's even harder to lose healthcare benefits. Therefore, people have much less pressure and even somebody working at the Booking.com call center in Berlin can take half a year off to decide what he wants to do next.
However, "hundreds of workers" who "defy Amazon rules" to "protest company's climate failures" are not lowly paid warehouse employees. They are tech workers, who probably make 200-500k / year, and have plenty of options in their lives.
These protesters are far from becoming homeless overnight.