Yes, I do, because of the following.
First of all, there's a difference between a secret vote choosing you as my elected representative in the country and workers making a decision about whom they want to represent them in their collective bargaining relationship. You understand nothing of the dynamics of the power relationship between an employer and an employee in the workplace in the first place.
The power dynamics are not the same. The employer has greater influence and power over workers. That's why the majority of cases filed before the boards are about employers firing workers who have chosen to join a union. The majority of cases concern employers who have intimidated workers for being involved in an organizing drive, because of the employer's interference with the union organizing drive in the first place.