De Broglie matter waves showed us that we can identify the frequency of the particle travelling at any point using it's momentum.

This technically does work for macroscopic objects as well, but the frequency of oscillation is just very, very small. But isn't this a huge discovery? That everything is made up of probability waves when moving?

In this case, why do we just ignore this fact when considering large objects, like a football, saying 'oh the frequency is way too mall anyway so we don't consider it'??
wtf?