Opinionated frameworks have their benefits. If you're working in their chosen domain, they're often pretty cheap to use. And for some teams, it's especially handy to have plenty of opinions baked in to minimize arguments over every goddamn thing.
When he wrote, "Many front-enders, on the other hand, who have worked with JavaScript and browsers for years and have developed their own coding style, tend to have their doubts about Angular," my thought was, "Oh god, imagine a team of 10 of those people."
I too have developed many style preferences over the years, but long ago I learned they don't matter nearly as much for project success as having a common style.