There are multiple examples on the internet of people explaining why this just isn't true, but heres my version.
Some men have a low sex drive, some have a high sex drive. The "as horny as men" women are probably below the male median. I'm on the high end of male so let's see if you can relate here.

I am horny literally all the time. I'm rock hard and ready to go in a second when the opportunity presents itself. This isn't a lack of sex thing too, I rarely go a week without, and sometimes if I have a capable partner i'll go into double digits in a day if we have nothing on.
I have to have breaks at work to go rub one out because I literally cannot think straight due to hornyness. If I don't rub one out daily, my standards drop (they're still there to an extent) and i'll fuck just about anything you throw at me. I'm not even a little bit gay (as in, I don't find dudes sexually attractive) but once or twice i've even thought about saying yes to one of the gay dudes I know who have made moves a couple of times just for a warm hole to thrust inside of while pretending they're not a dude, or maybe shutting my eyes and letting them blow me, I got a blowjob from a biological male once whom I didn't know was a biological male at the time and it's the only blowjob i've ever come from because they were that good at it. If offered a blowjob by an MTF again i'd probably say yes if they were equally or more convincingly feminine. Even if i'm currently having sex 11 times a day with a 9, i'd still really struggle to turn down a 12th with a 4 (about as low as i'll go).

So, are you really as horny as a man? Or are you just horny by girl standards?