Because: 99% of the time what the client want is "similar" to the other features there are already out there not "exactly the same". 100% of the time they wan

Because: 99% of the time what the client want is "similar" to the other features there are already out there not "exactly the same". 100% of the time they want something that isn't on the standard template that is a huge pain to work into the template you choose from, while it may be alot easier and faster to do it form scratch. 120% of the time the update of the template you choose will break your modification and you have to choose between having a non secure website or fix your modifications (every time) Template and CMS only work if you know what you are doing and you understand that you are compromising your ideas to fit into the Template/CMS you choose.