There were plenty of HTML _editors_, but the process of actually publishing something on the web required technical knowledge about networking and system administration. This was the domain of tech enthusiasts (and still is today), which evolved into the web hosting industry, and later enabled the proliferation of centralized web platforms like social media. My argument is that if tools existed from the very start that made publishing content as easy as web browsers made consuming it, the web would look very different today, and for the better. Clearly this was planned in the early WWW proposals, but never caught on for some reason, and I'm trying to understand why.
No, the earliest I remember what Netscape Communicator, which included the whole suite of Navigator (browser), Composer (wysiwyg editor), Mail, and News (Usenet). That was basically the latest versions of Netscape before its downfall, not the earliest.