I mean, if you never want to read your notes again, sure, that's more secure. But writing stuff you will immediately burn and never want to read again in the future is such a different thing from using a syncing notes tool that the comparison doesn't really make sense.
I just thought the implication of the copy was funny, wasn't really making a serious comparison of every possible use case and threat model for pen and paper versus this tool. Each has its own advantages.
