Frequentism relies on the dubious assumption that an objective reality is both possible, and that this privileged reference frame is the one from which the data being analyzed were taken.
Einstein's general relativity is fundamentally incompatible with the concept of a privileged reference frame from which an observer can operate objectively. Einstein credits his socialism with providing him this insight, and frankly all of relativity breaks down without it.
Bayesianism acknowledges that bias is fundamentally intertwined with all evidence, and that evidence only makes sense within the context of the question being asked. Bayesianism is the recognition that all new data must be interpreted within the context of the biases that led to it being taken.