A generalization like “wordpress developers are not the best” is just plain ignorant, or more likely it’s projection… a reflection of their own inadequacies managing a WordPress site. Clearly cyela is not a developer or else they would have first backed up their site/db, and could have avoided the mess they got themselves into. Then again, the blame first types never think they’re at fault.
As a WP dev, it’s frustrating to have to read these kinds of comments. If they actually wanted to address the issue, they’d have detailed their steps so that their particular issue could be replicated. But this just sounds like sour grapes because they couldn’t be bothered to mitigate the risks before trying a new plugin.