Massive disappointment with craft brewing

I'm confused as to why my Sims can load the fizzer machine, start the fizzing process then walk away and do something else, but they are forced to stand and watch a molded candle until it can be carved. Who does that in RL? So I have my Sims load and start the fizzing process then start a carved candle. The fizzing usually takes a little less time than it does to complete a candle, and my Sims are able to complete two things at once. If I'm really pushing to complete more juice and candles, I'll have my Sim stop working on the candle, reload the fizzer and then finish the candle. But if you're making seltzer that takes longer, you can get through about one and a half candles in that amount of time. I did make the mistake of placing completed candles on some shelves aaaand had auto lights enabled for the crafting room. So imagine my shock and horror when I discovered every candle I had made had been burning while my Sim was in the craft room, and all that was left were little lumps of wax on those shelves. My Sim was one candle away from completing my personal challenge of creating five of each of the scented ones, too. I had hoped to have a yard sale with those candles, so I was a bit bummed when I had to start all over. But there is so much money to be made with the fizzy juice, I have to be careful about which ingredients I use or I end up donating to charity every day just to keep my Sims from becoming too wealthy. I have to say, I am having a lot of fun with trying out these juices and candles on dinner guests. I threw a pool party, lit a couple of rose scented candles, set out some rose flavored kumbacha, and things got very interesting very quickly. Let's just say the Langraab and the Pancake families have some serious issues now. I might have some issues with how the crafting was done in EL, but I can't deny the fizzy juices and scented candles do come in handy when setting the right mood for parties.