Man, your message really gives some toxic vibes. It sounds like “either play the game right (the way I play it) or GTFO”. You can’t tolerate other people being not as skillful as you, can you?
No, Raynor’s economy is not balanced around MULEs. If Raynor mines minerals without MULEs, then he collects them exactly at the same pace as Swann, H&H or Tychus — and that’s enough for him to make a solid army. Mass-Orbital-mass-MULE cheese is mostly intended for either a meatgrinder strategy (throwing bodies away) or for mass Spider Mines — other than that Raynor just won’t need as much minerals.
And that’s exactly the thing of Raynor P1 — buffed infantry HP makes casualties much more unlikely, which in turn doesn’t require you to throw bodies at a problem as much anymore.