Which is a performative act of solidarity with warehouse workers. What happens if those in right-to-work states unionize and get sacked? Biden isn't shouldering any of the risks they are.
Actions matter more than words. At this time, it's not even clear if Biden will go to the mat for a nationwide $15/hr minimum. That would do far more to incentivize Amazon to improve working conditions, as its $15/hr starting rates would no longer be competitive.