I see that comment as being constructive criticism, without a doubt. It concisely points out at least three very relevant ideas: 1) There's nothing particular

I see that comment as being constructive criticism, without a doubt. It concisely points out at least three very relevant ideas: 1) There's nothing particularly innovative about this proposed approach. 2) The past attempts haven't necessarily been successful, and taking the same (or a very similar) approach one more time also likely won't lead to any more success. 3) The lack of success in the past is very likely due to problems inherent to the approach itself.