Warehouse workers are the ones trying to unionize so all stories about drivers are irrelevant. You know this. I shouldn't have to specify.
Re your source, 1) The verge is currently lying about the warehouse/driver distinction so their credibility is very low, 2) the claims were anonymous or second-hand, and 3) they aren't saying there weren't bathrooms - but that people were trying to improve their speed.
Literally nothing that supports the need for a union. Nobody claims to have a medical reason that they needed to use the toilet and having been forbidden, or even had pay docked. That would be illegal under OSHA guidelines and they'd have just reported it as such at the time. Courts are extremely friendly to these suits from workers but apparently they never actually happened.
> “From their point of view, we don’t have the right to be ill,”
Nope. Illegal. If that happened there'd have been a lawsuit.
> “I had a fit at work and was taken to the hospital. The next day, someone rung me and asked why I was not in work. I explained to them, but it was still marked, ‘no call, no show,’”
Um yeah, you didn't call or show. That you (may have) had a valid reason to leave yesterday doesn't translate into not having to let them know if you're coming in today. Not a valid complaint.
> But despite having legally compliant break times, workers noted they had to walk quite a distance from their main work area to the break area, which greatly diminished how much time they had left to rest.
If you're required to take your break in a designated area then the time to travel there is not part of your break. If some manager got this wrong and stuck to it, it's a reason for a complaint and a maybe a lawsuit which the employee would profitably win. Maybe this happened, but all companies can make mistakes and the fix is easy.
It's not that they can't just want to unionize. That would be fine. Pointless, but fine. What's not is the lies. Their case for abuse clearly has no merit.