Problems with ACA site

To my friends Hal and Mike, as someone who has worked the industry for many years, I understand the difference in site scalability and know that in software development anything can and will go wrong. That doesn’t explain why they didn’t consider the risk of millions visiting the site nor of the possibility of a dos attack. Also, why the requirement to create an account before you could shop? Ecommerce sites in general don’t require setting up an account before shopping. And also, why so many vendors involved with the development of the site. It seems as if there was not one main project manager in charge. It just seems that an administration so tech savvy would not have allowed for such a site to have been built knowing the ramifications politically and managerially.