The poster asked about exercising based on his personal preference which is he thinks machines are "wimpy". I told him to stick with free weights if he likes them and suggested that heavy free weights and slow cadence do not go together. Im not discouraging him. If anything, my suggestions are providing him what he needs based on his interests which would, in my mind, ensure consistency.
A competent trainer, in my mind, would provide safe instruction to whatever activity the client engages in, whether the activity is suggested by the trainer or the client.