I'm not sure. They're lawyers, not engineers, and I don't see any reason for lawyers to conclude "It's fundamentally complex, impossible to get right, and going to have problems" rather than "Well, they just didn't try hard enough to make a good law". And certainly the belief that they can create a solid law through sheer staggering complexity rather than despite sheer staggering complexity is a more parsimonious explanation of what has been happening lately than the idea that they know that simpler laws are better.
There are few enough computer programmers who figure this out even with the math staring them in the face and great engineers all but spoonfeeding these tidbits of wisdom; I can't imagine this is anything like the common perception of law in lawmaker circles, and especially not in circles where people believe activist government is on average the solution to everything.