Worked in and managed a few "Agile" teams. Never heard of a dev get punished for a bad estimate. Can you describe exactly what you mean?
a) engineer spends more time trying to guess which direction the wind will blog b) engineer starts sandbagging estimates c) engineer changes nothing. looks bad next time the imaginary goal isn't met. "bob needs help estimating".
Push back on that. Agile says other things are more important.