Just because a stock phrase can be wearing doesn't mean it's pissing someone off or the person is judging the person who said it.
I regularly hear people who want a higher-up's direct contact details or is angry that they haven't heard back in a particular amount of time.
I understand those comments. I can't give those details or explain the delay beyond giving details of the complaints procedure which lists who to contact and their details. The wearing part is often because I understand those failed expectations well and I can't do anything more about how there are often many promises made by other people, but the clunky, under-resourced systems can't meet them.
Really, the only time I get 'judgy' is if there is one upset person/family and someone unrelated to the situation overhears and decides they need to step in and rile things up further. The person riling thing up is pretty much always just making things harder for everyone while acting like they're a hero for pushing people to ignore the complaints procedure or act like someone just need to be yelled at more to break that procedure.
Volunteer roles, as valuable as they are (and I do two) are nothing like undergoing professional training and signing up to an ethical code that puts your client's welfare at the very heart of it.
That depends on the role and organization. Many voluntary positions involve signing up to an ethical code, some even have legal ramifications if broken just like their paid counterparts.
The paid professionals will have other obligations, responsibilities, and training over the rest of the organization, but for that particular area, the ethical code is usually the same and it's not unusual for training & CPD for that to be given to paid and volunteer staff side-by-side.
They're different roles, but saying the training and ethical requirements are nothing alike is dismissive and ignores organizations with a lot of integrations between paid and unpaid staff, no matter how many volunteer roles you have.