Some of you should review your responsibilities and obligations as pilots - AIP GEN 3.5-13 section 4.7 for a start.
If the BoM don't have someone on scene, how else are they going to know if the actual is different from their forecast unless someone reports it?
As pilots we're all colleagues; the information we provide can help someone else.
The ATC system processes AIREPs direct to the BoM aviation section.