Blaming the person that could see the issue isn't really ideal here, but it depends if the person stated that will never work without any technical merit or if

Blaming the person that could see the issue isn't really ideal here, but it depends if the person stated that will never work without any technical merit or if given a break down of the issues and technical problems but management/leadership ignored it then you're damn right you get to say I told you so, hopefully with a PoC showing that it works with said issue.