Explain wHy would grasses release more pollen than insect/bird pollinated flowering plants?

Question

The first answer that come to the mind is that the grasses are wind-pollinated, with the ability to spread pollen to other grasses. But why would grasses release so much more pollen THAN the insects/birds does?

Answer 1

YOU ARE PARTIALLY CORRECT AND THERE ARE SO MANY MORE GRASSES AND MORE OF EACH SPECIES THAT THE GRASS POLLEN FAR OUT NUMBERS THE OTHER SPECIES.

Answer 2

Your first answer is correct.
The problem with wind pollination though is that there is no degree of certainty attached to the direction of the wind. The more pollen produced, therefore, the greater the odds of it finding a receptive plant to alight on. Also, the amount of separate plants in a field necessitates a large quantity of pollen released to ensure the maximum chance of genetic inheritance.