Rather explain why YOU think that photosynthesis suddenly becomes irrelevant once flowering has commenced. By that notion there would be no need to feed it either because apparently the plant has no need for energy during flowering. Leaves are key to photosynthesis, photosynthesis creates energy, plants need energy when flowering.
And your post of random sentences doesn't read as anything i would take as scientific fact, just a bunch of sentences. Half of them aren't even relevant. You just copy and pasted someone elses, by your words, theories.
True , maybe one day when i grow up i can be as smart as u are Sir.