The data indicates that most of the clicks before are definition, data or research-related rather than conversions-directed.
There are two ways to look at the zero-click (non clicking) action of the user:
1. The data did not answer the user's search query. Either it was not presented well or it was not the data the user was looking for in the first place.
2. The users can already see the data that they want in the featured snippets, they won't proceed to click because all they're after is information or research data and they no longer need to process or perform any action on the website featured on the snippet.
On the part of the user/researcher/web surfer, this helps them a lot since it lessens the time they'll need to read over/browse over irrelevant sites. Position ZERO or featured snippets results are given more character spaces to present their data so for the researchers who need but a definition or a gist of the info they're after, they save on time by not clicking anymore.
Google's primary purpose, that is: to help those who are looking for data on the net, is served in this case.
On the part of the SEO, it's a headache if the site being handled is of a blog-type or news-type site since the impressions will increase (if the site is included in the SERPs), BUT the clicks, ergo the Click-through Rate (CTR) will decrease.
However, NOTE that those who clicked ( your actual website visitors) are more conversions-directed since they have already been given the elevator pitch by your snippets and they proceeded to click. This results in a Good Conversion rate.