One of the great successes of Intel has definitely been establishing their processors as the default optimization status quo. Beyond the scheduler, compilers also optimize (by default) for Intel instruction latencies and pipelines.

One way to remedy this would be to ship more distros with march=native as the default. You only need to specify the architecture when you are building binaries for distribution (which mostly happens on CI servers these days). This would result in better perf on not only AMD chips, but also newer Intel chips.