This is so true. Every stand up call you attend and scrum master asking for ETA. Where it pains the most is when scrum master has 0 idea about what all needs to be done and what is critical, what needs collaboration. Its just hey when would you do this? I've seen developers give early deadlines die to getting nervous. And I've seen it a hell lot of times. While seniors handle it reasonably but for juniors it can become challenging it they don't learn how to tackle the trailing questions.