The estrogen in beef is actual, mammalian estrogen. Which would you expect your body to interact most within digestion? Of course it’s going to be the stuff that’s closest to it.

The FUD being spread around soy is ridiculous.

Other nutrients that tend to be harder to find in plants than animals also tend to be more poorly absorbed than their animal counterparts. B12, iron, d, zinc, etc.

I would not expect a better reaction from actual, mammalian estrogen. It doesn't work that way with opioids: carfentanyl is a whole lot more powerful than dynorphins, enkephalins, endorphins, endomorphins and nociceptin.

Also, quantity matters. Plants might produce a lot more than mammals do.

In any case, the breast growth on males is no joke. That is just the affect on adults, who are far less susceptible than babies. However it works, soy is a serious hazard and should have the GRAS (generally recognized as safe) status removed.