just because the advertising says "bloom booster" doesn't mean it actually makes your buds bigger,lol.. . that's marketing dreck.
the right balance is needed... law of consevation of mass makes sense here... the nutes your give are broken down and repurposed. cells build molecules according to instructions in DNA. those exact same atoms are rupuprosed for cell wells, organelles and everything else that constitutes a plant.
it needs those building blocks in at a particular rate relative to what the environment and dynamics of photosynthesis / biological processes at play. adding more or less does not change the potential demand relative to these factors. so, you feed what you can without toxicities forming, then back off.
burning the shit out of your canopy in flower phase is not optimal. that's counterproductive due to reduction in photosynthesis occurring.