There are individuals and subcultures that prioritize idealism, yes. Often they are young people. Idealistic individuals can get ground down and turned into pragmatists, but some hold onto their hopes and dreams very tightly.

I mean, one could argue that the early Soviet Union suffered from this issue. Or early revolutionary China. Cambodia is certainly an example. The french revolution might be an even better example, what with wanting to re-do the clock and calendar and such. To convert startup culture speak's "pragmatism beats idealism" into political science speak, it might come out as "rationalism has tremendous difficultly reinventing all unconscious behavior".