Sorry for the delay. I didn't see your post. Yours is an argument that I have heard often from people I respect and believe. Using the Jobo for me, though slower than the tray method, helps to isolate me from the chemicals which are causing some allergic reactions even with Nitrile gloves, face mask and filters, and a hurricane ventilation system. If the problem gets worse I would have to quit film altogether and learn that other stuff. Just another factor I have to consider.