Every new blog post that you publish gives you an opportunity to spread it through social media, which helps to drive more traffic back to your site. Use your blog as a way to connect with your audience. Your blog isn’t a place to just post overly promotional posts. This is an opportunity to address possible concerns or even common questions related to your service or product. If you are worried about coming up with enough content ideas to publish blog posts on a regular basis then check out these resources:
What you are in fact talking about, are Google's death stars like the Shopping box, Knowledge Graph etc. It's fully understandable why many SEOs can't stand them 'cause whole categories of websites (price comparison platforms, for instance) have already fallen victim of such death stars, and there will be certainly numerous other portals, which will lose almost all of their traffic in the near future. Despite your (quite good) suggestions on how to circumvent such an issue, the situation for such an endangered portal can be hopeless when it's its whole business model, which a new Google feature makes obsolete. See geizhals.at for a very famous example.
You can also make sure that you’re not bleeding revenue due to friction somewhere along that path. How does that work? When you focus on organic search traffic, you’re compelled to take the battle to multiple marketing fronts. While SEO outperforms all other channels regarding ROI, it doesn’t always work in isolation. Email marketing, content marketing, social media, and other channels can all serve your SEO strategy. I’ll tell you something about marketers who are truly worth their stuff.
At our agency, we work with sites of varying sizes, from very large to quite small, and recently, we have noticed a trend at the enterprise level. These sites aren’t relying as much on Google for traffic any more. Not only are they not relying on Google traffic, but also, the sites are getting less than 10 percent (or slightly more) of their organic traffic from the search giant.