"Why? Google says because the tool is not just for webmasters, it is for hobbyists, small business owners, SEO experts, marketers, programmers, designers, app developers and yes, Webmasters – but webmasters are just one segment of its user base. To make it more inclusive and not to scare away non-webmasters, Google renamed the tool."
I withhold snarky comment, because it probably makes sense.
Federico Sasso
Oh yes, it probably makes sense, but to me only adds confusion.
Google Webmaster Tools Rebrands To Google Search Console