Why in all plants small flowers are most often collected in inflorescences, and large ones are arranged one by one?

For all living things on earth, including plants, the most important biological process is reproduction, since existence is impossible without it. Therefore, there are various mechanisms in nature to make it happen as fruitfully as possible. Many plants are pollinated by insects, which are attracted by the bright color and aroma of the flower. Since large flowers are visible to insects and give off a strong odor, they grow alone. Small flowers for this are collected in inflorescences. Large flowers contain more pollen than small ones, and in the inflorescence they will all be pollinated.