Absolutely, but it's not necessarily as simple as patternmatching to "claims label" and "is visible and obvious to me personally." Especially when you're dealing with stuff like religion, ideology, culture or politics, it can be hard to make any really meaningful statements that generalize usefully.
How does socialism work out in practice? It's tempting for some folks to point to the USSR, but that's just because it's a big obvious thing with the word "Socialism" prominently emblazoned on it. The EU is pretty darn relevant there as well.
When most Westerners think "Islam", they don't think "polyandric, matrifocal, highly-educated pluralists comfortable with secularism" either, but the Minangkabau people outnumber al-Qaeda, Hamas, Hezbollah and the Taliban combined. Those latter have a lot more to do with the first things that spring to mind when Westerners hear the word "Islam" though.
What I'm saying is, "How does this work out in practice" is terribly vulnerable to the availability bias.
For what it's worth, I don't think socialism (State Communism) and socialism (western Europe-- I'm not sure what the best name is for democracies with strong safety nets) are the same thing-- they have extremely different practices and trajectories. I think this supports your point that you need to actually know something before you try to address the question of how an idea works out in practice.
If it's any consolation, I don't just wonder that sort of thing for social justice. I've thought how Atlas Shrugged, a novel which is an extended attack on crony ...
As Multiheaded added, "Personal is Political" stuff like gender relations, etc also may belong here.