No it is not surprising. He is a long time Dash investor. pumper and moderator on Reddit. I bet he is a Dash Master Node holder as well. A completely biased Monero perspective to say the least - obvious FUD poster and obviously has no clue of what he is talking about - or, he is just purposely lying and omitting pertinent information. If you want to learn about how Monero works including "stealth addresses" and other things this bozo (conveniently) left out of the article ... https://www.monero.how/how-does-monero-privacy-work
RE: Warning: Every CryptoNote/Monero transaction in history will be retroactively exposed