What rock are you living under? Plenty of the documented absolute nightmare of working for Amazon in their warehouses is corroborated by their own internal analysis. Unions are for more than just making sure people don't die when doing their job. The union I am a member of more than doubled the wages of its members after its first 12 years of existence. Crucially it also ensures twice yearly cost of living adjustments. It is the only way for labor to have a meaningful negotiating position. There are shitty unions out there, but there are a lot of shitty employers too. Amazon's internal reporting shows they're going to exhaust the labor pool in several areas because they've cycled through everyone who could possibly work at the warehouses and fulfillment centers. People aren't leaving Amazon because they aren't allowed to use the bathroom. They're leaving Amazon because it is dehumanizing and miserable. Funny how the people who make the lowest wages have to put up with the most shit.

OSHA is always thrown around as either an overbearing force of oppression or a magical savior of the worker by anti-union people.

The reality is that it’s a toothless tiger by design. Many states do their own enforcement, and don’t exactly prioritize it — IIRC, North Carolina has 20% of the inspectors that it says it needs.

I’m sure your cushy IT gig requires you to stand for 6 hours without taking a piss. Try it sometime before attacking others.

OSHA did away with all that on paper. In reality, OSHA compliance varies considerably across manual labor jobs. Here's how:

Suppose you're a manager/foreman. You never outright tell your staff to ignore safety regulations; you simply give them a huge workload with a deadline and set of equipment that make it impossible to feasibly accomplish the workload within compliance. Your workers catch on that in order to get the job done, they need to ignore the safety regs. As a manager, you look the other way as they ignore the rules. If an injury happens on the job, you then blame the worker for ignoring the safety regulations, which of course you instructed them to follow. Follow up by giving them a drug test so you might even be able to get out of paying them workers comp.

This is how it works in the real world. Source: seen it, done it.

This is pure historical revisionism concocted solely to diminish modern struggles for worker organisation.

Wages are and have always been the primary driver of unionising.

The main motivation was never mustache twirling capitalist charicatures shoveling children into furnaces as fuel or some other unambiguous evil that we have since banished. Conditions have always been part of the bargain, but the goal has always been first and foremost higher wages.