Are you criticizing the abstractions, or amount of infrastructure?
His points are fine, but shocker its the same principals that apply to all code, infra isn't that special, thought we established that years ago.
Also starting by boasting about the number of lines of code you have written to achieve something is asking for trouble.
It feels like many in the 'devops' community that are from an ops background are rediscovering software principals, this chap isn't alone in that!
What I do see is 'devops' typically changing code in critical areas without taking sufficient care, but thats more a cultural thing than infra code being special.
I don't see a lot of build pipelines with automated tests and deployment for IaC. Standardized processes like pull requests with code review are also not ubiquitous.
With terraform one typically writes a template, does a plan, then apply and hopes for the best. What I've seen and the OP mentions the same in his talk is that things occasionally go terribly awry in ways that common software development practices would prevent.