A crucial benefit for me, and maybe for you also, in doing the darkroom work is indisputable authorship of the photographs that result.
When you send a negative to the lab that negative is in reality subject matter for what happens next. The guy or girl at the lab photographs your negative with special paper backed film, processes the result, and sells it to you.
Curiously, photographing negatives with paper backed film has been dubbed "printing" but it is photography nevertheless. And all the control variables of photography apply too. The lab people decide focus, cropping, exposure, development, density, contrast, image colour, and border trimming just to mention a few possibilities.
Every one who has never made a photograph from start to finish just doesn't appreciate the amazingly arbitrary technical chain between a given camera exposure and the particular photograph the lab delivers to you. It is only through the photofinishing industry's experience in guessing what sort photograph you would like to pay for that they stay in business. I know. I used to do it. Provided I dialled in blue sky, green grass, and made people's faces pale carrot colour nobody complained.
All of the above can be paraphrased in the words of JBrunner and others: control, control, ........