Unpopular opinion: I think it's somewhat reasonable to say that the cops shouldn't be punished legally if their protection or level of service to any particular person wasn't sufficient. I get why there's so much anger at this ruling, but I don't think it's a statement about what the police are "supposed to do" so much as a statement about what they can be held liable for within the justice system.
Uvalde is a whole different situation. They actively prevented people from going in to rescue their own kids, including handcuffing, tackling, pepper-spraying, and tasering them, while doing nothing at all effective about the shooter for an absolutely inexcusable length of time. They said hey, if you're in there say something, and one of the kids said something, and the guy heard her and shot her, and they didn't intervene at any point to prevent that outcome. They're directly responsible for the deaths of quite a few people. At that point, I think the legal system is well within its rights to say they've crossed the line from being simple bad cops into being liable for the criminal-justice consequences of their actions. Honestly? I hope a bunch of them go to prison for a long time; it'd be a better outcome for everyone involved.
Like that lady who they handcuffed and then when they let her go, she went around the back to go in and get her kids out, and then they harassed her afterwards because she was giving interviews that made them look bad. Charge them with harassment. It's not some feedback about their job performance; it's a class B misdemeanor. "Oh no... but, I, um, I thought that was part of my police duties. I can't, um, be held liable if I'm just doing, um, my job I guess, to go after this lady and punish her for what she did..."