I think the parent commentors point was that it is nearly trivial to generate variations on unit tests in most (if not all) unit test frameworks. For example:
A belief that the ability of LLMs to generate parameterizations is intrinsically helpful to a degree which cannot be trivially achieved in most mainstream programming languages/test frameworks may be an indicator that an individual has not achieved a substantial depth of experience.
Java: https://docs.parasoft.com/display/JTEST20232/Creating+a+Para...
C# (nunit, but xunit has this too): https://docs.nunit.org/articles/nunit/technical-notes/usage/...
Python: https://docs.pytest.org/en/stable/example/parametrize.html
cpp: https://google.github.io/googletest/advanced.html
A belief that the ability of LLMs to generate parameterizations is intrinsically helpful to a degree which cannot be trivially achieved in most mainstream programming languages/test frameworks may be an indicator that an individual has not achieved a substantial depth of experience.