Right but that's the point: there's nothing wrong with "invisible matter" as an explanation if it explains everything. Even if it's actually not invisible matte

Right but that's the point: there's nothing wrong with "invisible matter" as an explanation if it explains everything. Even if it's actually not invisible matter, provided it behaves like it at all times, then that's good enough until it doesn't. The universe has no requirement to satisfy the day-to-day intuitions of African-plains originated upright apes, with senses optimized to spot large predators, in how it works. Quantum mechanics is a great example of that.