I remember hearing somewhere that the reason n.1 people leave their job was their manager. Don't know if that's true but the idea's there. So it makes sense that your manager should be a major decision criteria when you pick a job (being able to actually pick a job is also a privilege, but it's fairly common in SWE)
Many companies have a team-selection process that starts after (and is separate from) the actual hiring, e.g. you might not know who the available managers are or if there even are any 'good' ones.
