This is a valid point: it is impossible to ignore some of the darker allegorical patterns in his literature. The example of British class springs readily to mind: Sam is a perfect batman (as in an aide-de-camp), a working class member of Bilbo's staff.
If Tolkien were German, he might have had a race resembling the Khoikhoin, whom the Second Reich (under Kaiser Bill) tried to clense from Namibia in the first decade of the twentieth century.
Crappy poetry and songs? No accounting for taste. These songs are repleat with historical insight. Not something I listen to all day every day, but they are certainly technically compelling.
Tolkien, as they say, was a man of his time. Sexism was not his invention: he was merely reflecting the biases of the times. The obviousness of Universal Suffrage had only become apparent when the women of Europe were left to run the industries whilst the men were drowning in the mud of the trench that stretched from Swizerland to the coast of Belgium. Maybe without Tolkien the rigid gender delineations of the (Christian) Europeans might have made survived longer unchalleged.
We might also not have any rich tapestry at all: just little niches of special interest, like gothic or space opera. Tolkien gave a palette and easel for others to paint their masterpieces.