Have some BHO properly purged tested for contaminants, and then have that bubble hash tested Unless you are using Distilled, or RO water, you will find more contaminants in the Bubble Hash. Also it will have a fair bit of flavor due to the removal of the waxes in the water processing, but not all the oils.
Obviously only a few here are aware Butane is used Copiously in the Food Processing Industry, and even less have an understanding of Chemistry. the Biggest Issue with BHO is proper ventilation so one doesnt blow oneself up. Along with the recapture of the butane, the lack of vapor created in the evaporation process, thus decreased chance of explosion is where the recapture units like the Tansumi and the other unit comes into play.
Of course a full purge is key. but that is not a hard issue to tackle correctly.
Fwiw, Alcohol is cited as the cause of 75000 deaths a year due to health issue, sclerosis of the liver, stroke, heart disease ect....
I thought I had eluded to the fact too much water will kill someone previously, but maybe i was just thinking it and didnt mention it. But the point being, anything can and will kill you in the right situation. Water, alcohol, air, butane, peanut butter, strawberries, honey ect...
But having an Unfounded FEAR of Butane is as OCD of having an Overactive fear of Germs, where one has to wash their hands 1000 times a day... Point is, your body has more GERMS on it that will/can kill you than butane has ways to kill you.
Shit, everyone has a bacteria in their stomachs, and if it were to somehow get to your brain, you would have swiss cheese for a brain in less than a week.