I get that, but there's nothing in that post that's at odds with what I said. The studies quotes are using crazy high doses, anywhere from 75mcg to 150mcg/day. That far, far outstrips any dose that would optimize thyroid function at or near reference ranges.
It's a bit of a stretch to take that information, conclude that T3 is inherently catabolic, and therefore can't have utility at any dose in a bulk.
You're making blanket statements like "I wouldn't use it in a bulk" with zero context of where a person's thyroid is functioning. Again, you're looking at it like a fat loss drug rather than a thyroid drug. If someone's thyroid isn't functioning, certainly you wouldn't tell them not to take T3 because it's "catabolic", would you?
What's the difference between that and using a small dose of thyroid medication to optimize a sluggish or underperforming thyroid?