The most recent one I remember commenting on, the poor guy had a project that basically tried to "skip" IaC tools, and his tool basically went nuts in the console (or API, I don't remember) in one account, then exported it all to another account for reasons that didn't make any sense at all. These are already solved problems (in multiple ways) and it seemed like the person just didn't realize terraformer was already an existing, proven tool.
I am not trying to say these things don't allow you to prototype quickly or get tedious, easy stuff out of the way. I'm saying that if you try to solve a problem in a domain that you have no expertise in with these tools and show other experts your work, they may chuckle at what you tried to do because it sometimes does look very silly.