Agree and disagree. I agree as a default scenario, you are correct. However, we always need evidence to show if a team member is struggling and needs extra as

Agree and disagree. I agree as a default scenario, you are correct. However, we always need evidence to show if a team member is struggling and needs extra assistance, or in the worst case is not contributing positively to the team. This is not over a single blown estimate but rather a larger pattern of underperformance. This is the failure mode, however.