Unions are created by bad businesses. The fact is owners will maximize profits at the expense of employees. They will and have since industry started, abused employees and cheated them. One employee cannot stand up to a company. You are replaceable. All the employees walking out teaches them who makes their profits.
The Triangle shirt company disaster sparked unions in America. They had lots of young girls making shirts and they chained the doors to make sure they did not step out for a break. Then a fire started killing many.
https://www.history.com/topics/early-20th-century-us/triangle-shirtwaist-fire
My grandfather came to America and was a coal miner. He mined in Pa. and then Colorado. The miners were being horribly mistreated. When they started a union the company hired goons to beat them and shoot them. The union organizers were in a church for a meeting. The doors were barred and the building was set on fire.
In Detroit, Ford motor created a mafia type police force to "keep organizers in line'. They were beaten and killed. The workers had to battle for decent treatment.