Furthermore d3, typescript and jquery is javascript so the question is more like "do I need to learn how to use tools to make websites?" at which point it is kind of silly.
They're being downvoted because show me useful website that doesn't have any of those things. Yes, it's technically correct to say that you don't need any of those things, but totally pedantic because you WILL use any number of them for ANY real website.
Most if not all use CSS and javascript, but he mentioned a ton of techniques in such a way as to imply that most websites use all of them or that you needed to know all of them to do web development.
That is just not true. I am sure that most web developers don't know d3, svg (other than exporting it from a drawing program) or typescript.
Furthermore d3, typescript and jquery is javascript so the question is more like "do I need to learn how to use tools to make websites?" at which point it is kind of silly.