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Ronda Rousey is on the cover of a magazine, and everyone's mad. What's the big deal?

After all, the MMA star is the most visible and popular athlete in the UFC. She's been featured in countless magazines before, including on the covers. But this one is far more sensitive territory: Rousey's latest cover is on The Ring, a boxing magazine.

She's the first MMA star to appear on the magazine. And, as someone who has no boxing background -- Rousey was a judo master before joining UFC -- boxing purists consider the move an insult to the sport.

Truly an honor to be the first Mma fighter on the cover of @ringtv

A photo posted by rondarousey (@rondarousey) on

Boxers will readily point out that MMA skills wouldn't translate well to the boxing ring, where many of Rousey's signature moves are outlawed. Forced to dance on her feet and rely on her fists alone, most boxers wouldn't give her a puncher's chance against a seasoned fighter.

Naturally, Rousey and The Ring are taking some heat for the cover.

It's a tough crowd. But you can't blame The Ring, or any other magazine, wanting to hitch its cart to Rousey. She's soaring to unprecedented heights, while boxing ... well, it's not what it was 50 years ago.

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