I understand the typical issues with cops, but what issues are you thinking of that would also apply to firefighters? Are they systemically racist or enforcing the capitalist class' rule?
There's a ton of problems with the culture, but the job is an inherently noble thing. Cops maintain order through violence, firefighters maintain order by directly helping people. Cops are mainly a weapon, firefighters are mainly a tool. Any tool can be a weapon, but designated weapons will always be worse. They have a tougher job and a far more positive impact on society.
My point is that they let a black trans woman die for bigoted, hateful reasons and then tried to cover it up. Yes firefighters are generally better than cops but idolising them is kinda iffy considering incidents like this.