In defense: Big leaf maple (western maple) varies a lot. Some of it grows in the rainforest along the Washington coast, some of it in drier climes to the south and the east. You have to know where it came from, or better yet, see/handle it. I've used it for furniture a lot, but selectively. Color and figure can be amazing.
Years back I shot with Lauren "Doc" Brown, and saw many of the rifles he built. He had a connection with a small sawmill where the sawyer knew his wood, and saved good stuff for Doc. It can be a good stock wood when chosen carefully. Some of has amazingly tight curl to rival the best hard maple I've seen.
I wouldn't write it all off. I've seen/used BLM that was harder, heavier, denser than cherry or black walnut. At 12% moisture content, cherry's specific gravity is .50, walnut is .55, and BLM is .54.
I've got a fairly large entertainment center on commission right now that will be in BLM, and I'm looking forward to it. BUT, I will go to the supplier and select the wood myself. I've got quilted BLM and burl BLM ratholed for two-piece stocks, maybe for shotguns or underhammers in the future. It's easier to find shorter stock wood like this than it is to find fullstock or even halfstock blanks.