Think about all the things one can do for fitness:
Running, yoga, cycling, parkour, bodybuilding, powerlifting, strength training, hiking. It boggles the mind all the options one has. 

And every one of those options competes for the rational you. The one that weighs the utility, pros and cons of each of those endeavours. And has to decide what their activity diet will look like. 

Then there is irrational you who has 'fun' without weighing the actual utility of the endeavour. A powerlifter who will gun for a second deadlift session without completing even 1500 steps in a day. A runner who will have their sixth running day without having a single squat day. 

Now think of all the things one has to do in addition to getting to the gym in the morning or evening: daily care, school drops, email catch ups, figure out commute times, cook a decent meal, agonise over ageing parents, worry about savings, worry about their job. Or escape your worries with a quick episode of Peacemaker. That's so much simpler than physical exertion. And much less messy. 

For you to compete against Netflix (as a coach), clients should genuinely have fun at the gym. They should revel in every accomplishment. And recognise progress. They should find the joy and value in training.