Why should a contact form mean complex functionality? You can do it in plain HTML, even - is that complex already? Because validation? Like that (Google, it's you) address checking unable to place my house in the right village? Like phone number validation forcing you to add a 0 where no 0 is required to call me? And don't start me on streets and all that, or middle names, or dates or or or. Validations of form inputs are almost always a stupid yak shaving exercise, yet here we are.