Indeed. There’s nothing special about “smallest number of assumptions”. Occam’s razor is a nice guideline but not a great way to do EVERYTHING because we don’t always HAVE all of the necessary variables, just the minimum required to prove a point… which sometimes isn’t enough in the grand scheme.
(grand scheme being a metaphor for “encompassing reality as it is”… or at least as best as we’re able to do. We can ALWAYS do better)