Nah. Hard disagree.Obviously this whole thing is subjective. But I'm mainly responding to your claim that you "can't understand" why "anyone" thinks they can run the adventure as written. In fact, assuming that you can run the adventure you paid $50 for pretty much as written is a perfectly natural assumption and one that I guarantee the majority of purchasers - who are casual gamers and not dedicated ENWorld posters, pro DMs, or DMs with 20+ years of experience, definitely make.
Money is irrelevant. I have no idea why people keep quoting $50
If it was a failure as is being suggested then the reviews would accredit it such. They don’t.
So some people don’t like it. You can’t be all things to all people.