Red maples are the work horses of the forest in these modern times. No more chesnut, EAB killing all the ashes, spruce and fir decline, Beech bark scale disease and now the beech leaf disease, hemlock adelgid, dutch elm, that white pine beetle...black cherries are starting to get a little funky looking around here. But the red maple...will grow almost anywhere, grows fast, seems like it has no diseases that affect it, etc.
I burn a lot of red maple. Splits nicely. Burns hot. But yes, not as many BTU's compared to sugar maple or oak.
I also tap the big red maples and they produce a lovely maple syrup.
25 years ago when I first bought my place, I used to consider them kind of a useless tree too. I've come to respect them for all they provide.