Kind of funny that the difference in “power” between the .270 and 7RM isn’t worth discussing, but the .300 is a significant step up, despite that the same logic you just applied to the .270 vs 7RM also applies to the 7RM vs .300WM. The 7RM can launch a 195 EOL at 2875 fps; less than 100 fps difference between that and the .300/200gr, 5gr of bullet weight, and the BC favours the 195.
Your last sentence makes complete sense. Nothing wrong with personal preference!
I totally agree with you Jordan.