I've occasionally been part of training hourly workers on software new to them. Having really, really detailed work instructions and walking through all the steps with themthe first time has helped me win over people who were initially really opposed to the products.
My experience with salaried workers has been they are more likely to try new software on their own, but if they don't have much flexible time they usually choose to keep doing the established less efficient routine over investing one-time learning curve and setup time to start a new more efficient routine. Myself included - I have for many years been aware of software my employer provides that would reduce the time spent on regular tasks, but I know the learning curve and setup is in the dozens of hours, and I haven't carved out time to do that.
So to answer the question, neither. The problem may be neither the software nor the users, but something else about the work environment.
