An interesting observation, and it's consistent with my pragmatic take on scientific objectivity. Scientists are humanists, functionally speaking. They mean for their knowledge to be useful in advancing civilization, a point which Neil deGrasse Tyson recently made in an interview I'll be writing about.

But Tyson would dispute your point that this emotional aspect of science affects the results. The prediction would be, rather, that the common facts dictate them, so there are better and worse scientific theories, depending not on culture but on how well the facts are appreciated.

Subjectivity enters the picture, I think, in how the facts are understood. Presumably, aliens and humans would share the same universe with the same noumenal facts to construe. But culture, emotions, agendas, and so on dictate how the facts are represented and assimilated.