Genuine question: can somebody please explain why there needs to be a distinction between "true" unit tests and tests that work on several layers at once as long as said tests are runnable <1min on a consumer-grade laptop without any prior setup apart from a standard language + container env setup?

Over the years I had several discussion to that effect and I truly, genuinely don't understand. I have test cases that test a connector to, say, Minio, so I spin up a Minio container dynamically for each test case. I need to test an algorithm, so I isolate its dependencies amd test it.

Shouldn't the point be that the thing is tested with the best tool available for the job that ensures robustness in the face of change rather than riding on semantics?