Earlier quoted context omitted.
PIPs are a tool for managing out employees that don’t perform well or don’t yield to often abusive company demands like e.g. overtime or pissed of somebody in management or connected to management.
Last time I got put on a PIP was for refusing an entirely unreasonable request to be on call, and leaving my work phone at home during that period. I started making plans to resign pretty soon after being put on the PIP.
The dismissal process for underperformance here (UK) requires the employer to give warnings: one verbal, and two written, I think. The employer is also expected to help the employee meet the performance target. The PIP sounds like a checklist version of that help - it's not meant to help the employee, it's meant to hustle along the dismissal process. I'd take a job flipping burgers, rather than work for a boss that put me on a PIP.