I've been in environments where it creates fake pressure. Standups where you have to say something for fear that you'll be axed if you say nothing. Questions about whether a ticket is going to get done by Friday. I call these fake pressure because it becomes obvious that there is no teeth to them. People get away with doing nothing and making up a few sentences at standup. People say a ticket is going to be done, but it roles over through two or three sprints.
It's always been a sham for me. You can't point at the Agile Manifesto and say that we're focused on process over interactions. You can't point out that we need a Product Owner who is focused communicating the needs of real users. You can't point out that standups should be for the team's benefit and not status updates to project managers who are barely involved.
Still, I'm a firm believer that the Agile Manifesto makes some good points. I believe that there are elements of Scrum that are really beneficial if implement well. I believe all of it is subverted by management that wants a semblance of control/power. Most of the workers don't care whether it's subverted, they're just there to be paid while doing as little work as possible.
So, who's left to change it? A few righteous agitators? Who are they going to agitate? The managers who have control aren't going to give up the reins. The hoi polloi will ignore anything that takes extra effort.
Saying the scrum master needs to be accountable is true. Everyone should be accountable for something. However, there's simply no way for that to happen in many environments.
I've had scrum masters that were basically just required to gather status updates and report them back to the CTO. I've had contractor scrum masters that were hired because Scrum said they had to have that role but they ignored the part of Scrum that said there was a product owner role. I've had scrum masters that were just engineering managers who ignored their engineering manager roles to be the one who screen shared the Jira during standups, including one who was a Director of Engineering.
All of those scrum masters were installed by the people in power not to be held accountable for anything. Most of those scrum masters, like all the other workers, just want to get by with doing as little as possible while being paid.