Buddy, I wanted to ask and try to figure out if I'm missing on something. I didn't ask you, so don't feel obliged to read my question or respond to it. Capisci?
Actually... if you don't want others to respond to your posts for good or bad... don't post... but if you do post, don't expect others to always agree with and just accept that for what it is.
As for my previous examples being comparable... DIY in any form in any subject IS certainly comparable to extracting our own juices and a viable explanation as anything. They all share the same underlying reasons... controlling the final product ( ie customization ), making the product for less, just for the craft itself and I'm sure many others that I didn't take the time to think of. Just because you don't get why someone does DIY ... doesn't make it unfathomable to others that do.
As for extracting e-juice from tobacco being scientific... it's no more scientific than making tea or coffee where we extract those flavors into water with the only difference being it's done with PG, VG or some alcohol base so it can take longer. Soak times and temps are the main differences along with what type of tobacco is being used.