It is not a philosophical debate in the arbitrary way that you suggest. "Observation" and "measurement" are not used by physicists in this context as common words, but as jargon with very precise meaning. Depending on what interpretation of quantum mechanics they're using, the meaning of said jargon could be subject to some debate, but that debate takes place in the context of other premises established in advance.

None of those premises involve the magical power of thinking to collapse wavefunctions, because that stems from a common conflation of the Uncertainty Principle, which is a physical phenomenon, and the Observer Effect, which is a product of poor experimental design and can be controlled for.