The answer appears very obvious: it takes extra time and action to first open https://www.evernote.com/client/web , then click on "New note" and only then start typing. I would very much prefer to have an option of having something like https://www.evernote.com/client/web/newnote in my bookmarks which would redirect me to a newly created note so that I could start typing immediately after loading the page.
That's a non-issue: you don't wonder how the "New note" button does function in every browser, do you?