I get the idea of the possible confusion of which is the oil pan and which is the transmission pan. I'll admit last summer in doing the first oil change on my new/used Tundra, I put the ratchet to the transmission pan and did a couple turns before it dawned on me that it's too far back to be the oil pan. So I tightened it again fully and moved to the oil pan.
This could easily be remedied by a stamping in the pan "Transmission" and "Oil" and/or a different size and/or color bolt head to avert any confusion.
I totally agree! This is the oil pan on my '20 Accord: