Given the rule of voluntary participation, this is simply the application of that rule in practice. Don’t worry about every little hang-up: it is not your job to find time to devote individually to every single person. That would be too much to expect. But it is important to notice these things, and if they keep recurring, to think about perhaps speaking with the person informally outside the training activities in order to understand what the problem is and if there is any kind of support the training team can offer to help the person engage more actively.
