Sure! The flowers have many uses and it makes them more valuable, not only in an economic sense, but also in a medicinal potency sense. You're agreeing with this I think with your question. If I may rephrase, 'Why not make the medicine more potent by juicing flowers?'
There are limited uses for vegetative material. I've used it to make budder, but that's about the only use I've found for this material. Mostly, leaf and stem waste gets composted. I'm excited to have a use for this by-product of growing the flowers.
To the
bolded section, juicing raw cannabis is a relatively new method of ingesting this medicine. How do you know the flowers have the most benefit? Based on the little bit of information I can find, people are consuming a lot of juice each day. One of the documentaries talked about juicing less than 10 large leaves a day. That produces very little juice. I'm drinking ~2-4 oz a day. Have you ever had wheatgrass? It is reminiscent of that. To me, it feels like I'm drinking a very concentrated green, like wheatgrass. I'm looking at it as I am drinking supercharged wheatgrass.
I know that we're ingesting much more than I hear others' reporting taking. My wife was juicing more along the ~10 leaf amount (I was also trimming stems from below the canopy so we had smaller leaves and stem material so this is somewhat of an estimated conversion to large individual leaves). The first week I was providing a dozen big leaves each morning, so we got to see about how much juice that produced. That's how we are able to compare dosages. Now I will juice up to 16 ounces at a time and store a jar in the fridge.
I've been trying to push myself a little to see if you can drink 'too much'. When my wife had to stop juicing all green for a week, I had to use it up faster, so I'm drinking more in the 6-8 ounce range (including some apple juice ~15%) per day. I doubt there is any upper daily limit, but there may be a single dose limit. Last weekend, I drank ~6 ounces all at once. Only I drink it right now, so I just drank as much as I could from the jar. I guess I'm getting used to it a little. Within a few minutes, I had to sit down. I was never nauseous, but I did feel my stomach tighten a little. I was just light headed/dizzy. This may not happen to others as I have these symptoms fairly often. My wife says it's because I don't eat. I did feel better after eating something. I am able to drink 4-6 ounces just fine all other times. I think the empty stomach, and I had been doing physical work all morning before drinking it. The more I think about it, maybe it was mostly something specific to me. I've had that same sort of 'wave' of feeling come over me drinking other green juices though.
btw, it does NOT taste very good. I add some apples to mine to make it more palatable, and have also added carrot.
For now, I'll continue to use the flowers as I always have, but I'm very happy that I now have a use for the leaves and stems.
FYI, as far as we know my wife does NOT have cancer, but she DOES have multiple tumors/cysts. This is her motivation for medicating with cannabis. It's well documented that THC destroys tumors. CBD's benefits are just starting to be recognized. That's awesome, but I think it's been at the expense of THC. Let's not forget all the great things this other little family of molecules does for us humans.
And a big thanks to all of the thread's contributors as well (and those who have started/contributed to other Raw Cannabis threads... (and to all others on this site who spread knowledge and positivity, too))! 
