it helps the plant in many ways and they do take up sugars, carbs, ect. you basically enhance the root zone and microbial life in the soil and feed them in return they feed your plant.
i would keep using king kola and honeycomb as directed. ive used the product and have seen what it can do or what it does. king kola has plenty of what your plants need for flower but its part of a line, the 3 part which has a bloom feed ? instead of everything in one bottle they break it up to make money but in a way its still needed when using that line. no line will give you everything you need in one bottle or no money would be left to be made and some dont react well together when kept all in one bottle.
people say you can just simply use bloom and get to harvest with good results, some people dont add nutes at all just soil and water not even ph'd and still produce good looking plants so you tell me, should people just not buy anything for their plants? or should they use the line as directed and tweak it as needed?
the point is, youll get a decent harvest if you have a good enough environment for them to thrive in, even if you dont buy anything at all. second, youll buy products that have whatever in them and your plant may only use one thing or compound in that nute. give them what they need in your eyes i guess lol. conditions lighting water soil all play an effect on how nutes are being used by your plant so thats what determines your outcome what may work for someone else may not work for everyone. what hasnt worked for some or some that have seen no difference, may work for others. and to say it does nothing, can you see into the plant or soil and what its doing? or just what your plant is showing you on the outside? bc ive seen some shitty plants still produce dank ass buds and whose to say it wouldve been any better if the plants were grown better