I'm happy to provide whatever estimates are desired by the business, and I'm sure all other programmers would too. But...most of the time I'm estimating something that I haven't done before (or for a long while), so they're bogus!

The common pattern I've seen is that everything is about estimates, which end up becoming deadlines. The management worry about them to the point of bloody-mindedness, at the neglect of gathering actual requirements from the customer. In my company, I work in a software department (I suppose we're an internal agency with just one customer). But, we can't speak directly to the customer and instead speak to another Project Manager (apparently because of "SaFE Enterprise Agile" policies), so we can't ask the customer what they truly need, and so the product isn't accurate, and neither are those estimates!