But even if you didn't know the user was a cloudflare exec, the comment just becomes a boring throwaway comment from some luser on the internet telling you their thoughts, like posting 'Me too!' like some braindead AOLer.
For example, if jgrahamc said "I never knew that. Cloudflare is such an amazing company, everyone should apply for a job there!", then okay, request a disclaimer. But if someone just says "I didn't know that", then the comment goes from mildly interesting (if you know who they are) to boring (if you don't know who they are). The failure mode here for lack of disclaimer is the post just becomes a boring, low-effort comment.
I think jgrahamc adding "I'm the CTO of cloudflare, and I didn't know that!" might have been reasonable context, but no disclaimer is required, because the reader didn't need to be protected from the post. There was no conflict of interest in the post.