Totally. For a company that lives and dies by statistics in its business and technical decisions, it amazes me that they can act like employee performance on a two-pizza team is normally distributed and only about the team member.
Sometimes a poorly performing team member was just a bad hiring choice. You politely let them go and work to improve your hiring process. Sometimes the person is struggling for reasons outside work, so you try to find the right supports necessary. But most often, in my experience poor performance is about the worker's environment (culture, process, behaviors, projects), and those are all things managers are supposed to be monitoring and improving.
Sometimes a poorly performing team member was just a bad hiring choice. You politely let them go and work to improve your hiring process. Sometimes the person is struggling for reasons outside work, so you try to find the right supports necessary. But most often, in my experience poor performance is about the worker's environment (culture, process, behaviors, projects), and those are all things managers are supposed to be monitoring and improving.