Niggah you've absolutely haven't smoked real weed then. Buds vary the THC level depending on how it's grown With the right PH level around 6.0-7.5 And perfect Cross Breeding of strains = DANK ASS SHIT you can grow 30-40% THC buds.
Hash contains the most THC 50-60% Ive seen 75% In THC butter
Now Back to the Bong, It Filters all the harsh shit and Leaves you a more healthy, cleaner high and allowing more THC inhaling into your lungs than smoke and CO2
Pipes/pyraxes only produces 10-15% maybe less. And more THC will burn than inhaled.