Holy crap! Are people actually buying into this BS?
Software coding/design is similar to solving a maze -- you just can't give an accurate estimate how long it will take to solve the maze.
WTF? Yes, you can give an ESTIMATE on how long it'll take to solve a maze. Go get a book of mazes; Do 10 of them; Time yourself for each one; You now have min, max, and average times for a maze of that size/complexity. Next time someone shows you a maze, you can make an educated guess about how large/complex it is, then give your best case, worst case, and normal/average estimates. Do the same for programming.
Estimates are good for repetitive or non-creative tasks...
They're also good for creative tasks. I went to college with a major in fine art and worked for years as a monument engraver (etching portraits/landscapes/etc on tombstones). If someone asked about how long it'd take to etc a 5x7 portrait, I'd have a VERY accurate estimate for them. Is that not creative enough for you? How about every single project for every single class for every year of art school? ALL of those had timelines, and every student became quite good at estimating how long each project would take so they could get them all done on time. And you could ask most of them (at least those with higher than a B average) how long it would take them to do a certain thing (ex. sculpt a bust in clay from a live model) and, if they were familiar with that medium, then they could give you a very good estimate.
Estimation in the software world is a scam perpetuated by managers and management to get developers to work extra hard.
If management is asking the devs for their estimate, then how in the hell is it management fault for any of those timelines? Let me put this another way... devs, BE SMARTER. You've been asked for estimates on more than one occasion. Most that are new to development will low ball (stating a best case estimate). If/When you do that, you're just setting yourself up to fail. The best outcome will be that you are on time, and every other outcome sucks for all involved.
If you're not good at estimating, just try, come up with your figure,then double or triple it. If you always come in under the estimate, then you manager may start adjusting your estimates... who cares? Let them. It's their fault if you don't meet their manipulated figure. However, if you're not giving a large enough estimate in order to get your work done, then it is YOUR FAULT if you fail to hit your own estimate!
All that said, there are cases where providing an estimate is unreasonable. On one end of the scale, if a manager is asking for very accurate down-to-the-hour estimates on vague but somewhat small tasks, then it's asking for too much (almost more work estimating doing the damn thing). On the other end of the scale, if it's some grand idea for a giant project with no plan yet, you'll be pulling figures from your ass just as much as he's pulling the project plan out his ass... but it is what it is. Just go big.
A lot of it is just about setting expectations. If you give them high estimates, then you're more likely to meet or exceed their expectations. They may dislike the figure at first, but when you come in under budget they will be very happy and forget all about how high the estimate started out. A high estimate is not "padding", it's setting expectations that you can meet (see the maze estimate above... use "max" and you'll be able to meet or beat your estimate every time, which is what all involved really want out of your estimate).