My experience has been very much the opposite - integration tests are often very brittle, and finding the root cause is often almost a fools errand since stack traces are often no good for figuring out what went wrong, at least for web UI.

While yes, unit tests do have a maintenance burden, they are often reproducible, less flaky, give you targeted debug information, and run extremely fast.

There are heavy costs to integration and e2e testing that often gets dismissed by developers who often have not experienced the fast feedback loop a good fat unit suite gives you.