The core cause of bullshit jobs is not conspiracy, it's political economy. We currently choose (IMO a terrible choice) to have a money based society where "don't work" == "don't eat". And so work must be found. This is what it means when politicians talk of "creating jobs".
Just how do you propose eating without working? Someone has to work so she or others can eat.
1. under-bidding automation (this will be decreasingly successful)
2. politically suppressing automation (AKA "creating jobs")
…because nobody wants to abandon the "work = eat" rule.