Yeah this post has no idea wtf it's talking about. Dams are relicensed routinely by federal regulators and when they are they are routinely required to build in fish passage. If there's a dam blocking fish passage that's the path to fix it.
The mean, median and modal dam being removed is a low head dam constructed in the early 20th century or before to create a mill pond for some factory. They are almost never federally regulated because they almost never meet the height/size requirements.