I think that's an oversimplification. Do stakeholders have lots of input? I'm sure, after all, I also wouldn't build a product without asking potential end user

I think that's an oversimplification. Do stakeholders have lots of input? I'm sure, after all, I also wouldn't build a product without asking potential end users what they really wanted. But with something this high profile (and with an actual chance of passing, unlike most bills in Congress), I'd guess that Congresspeople are actually personally invested in their priorities that are in the bill (maybe those are partially written by industry, maybe not).