Along with all the bad things people have already mentioned, you have to add that, in reality, it's a creative job, which means it's inconsistent in producing g

Along with all the bad things people have already mentioned, you have to add that, in reality, it's a creative job, which means it's inconsistent in producing good content regularly. I'm not saying it's not possible, just that you cannot keep asking creatives to just produce good content, so you cannot really keep promising the best of the best most of the time, as you'd be able to in software development (assuming good development and team dynamics). This translates in inconsistent sales and hence inconsistent people development. These people (like those in stressed software development environments) end up taking sabbatical months/years at the end of each project.