It's a bit more complicated than that, but actually water weight will help with strength and the body's ability to adapt to more weight. Plus, don't forget that muscle s 90% water.
Besides that, anti e's also supress IGF-1 and increase SHBG. And androgen receptor binding is increased in the presense of elevated estrogen. So it isn't just more water that you get wihout anti-e's. It's more potential muscle growth.