Sounds a bit like the Bible in that it’s self referentially true. If there’s a hypothesis, measurement, and test then that’s science. If one takes that and adds other ideas onto it it’s science plus some other ideas. So far I haven’t seen anyone use Marxism-Leninism to discover new particles, new methods of computation, medical treatments, and so on.
You can have whatever ideas you want but ultimately there will be some outcome from them that’s measurable, even faith (or lack thereof) has measurable outcomes in the psyche and physiology of an individual or even a populace.
You see even science is used to legitimize these ideas within your own comment. That is we know ultimately through the scientific method if something is valid. If something has no measurable effect on reality then it can be noted but it’s not of much concern. Like for instance maybe on the tip of every match is ten thousand angels doing the moonwalk, if it has no effect on anything it’s not awfully important.