HN loves to make this claim but it just doesn't match my experience, from several teams. Estimates are not precise, obviously, but that doesn't mean that they are impossible to make or that they add no value.
I'm sure some people are significantly better than me at estimates, but I haven't met them. Estimating the unknown without serious research that borders on just doing the job is nigh impossible. And we're just an in-house dev team, so we never, ever do the same thing twice.
Estimating how long to put up another wordpress site is a lot easier than estimating a new project with new requirements and new tools. I typically find that people who think estimating is easy are just doing the same things over and over for new clients, rather than doing new things all the time for the same client/employer.