Did you enjoy clicking 3 buttons repeatedly 674 times with web loading in between each click? It seems easy and convenient for all users to include a button for using all 20 energy at once, the button already exists in the panchinko machine for multiple uses. There are limited reasons not to include such a feature, and they range from laziness to manipulative, take your pick. I would put my money on the manipulative side, as a larger time sink builds a larger emotional response, compiled with the financial sink that already exists within the game. I'm sorry you felt attacked by my closing comment. An idle game shouldn't lock you into a click fest for hours, I would personally consider that a waste of time, but it is subjective I understand. I think your time would have been better spend if you had that feature.
As I said I am really only trying to criticize the developers here, not anyone personally. I'm glad you got your emotional rush, I hope you continue to enjoy this game as you do now for a long time, but others should know what they are entering into as it isn't clear until you hit the 4th world to discover the active grind and make it through some of these jackpot events. As a free idle game you check on once or twice a day, it's not bad. Beyond that it's a poorly disguised cash grab phone game in a browser.