Does primer need to be perfect?

Does primer need to be perfect? The primer coat doesn’t have to be perfect, but it should cover the surface (no bare spots) and it shouldn’t be so blotchy that you get drips or visible unevenness.

The primer coat doesn’t have to be perfect, but it should cover the surface (no bare spots) and it shouldn’t be so blotchy that you get drips or visible unevenness.