It's a question of return on investment. If spending the extra minute everyday saves a probable $10k over your lifetime due to dental work, then yes it might be worth it. But if it saves a probable $10, it might not.
The cost of the dental work pales in comparison to the value of keeping your natural teeth, which is going to be much much much higher than $10k over your lifetime.
Not flossing makes your dental visits longer as they scrape off all the plaque from in-between your teeth. Just avoiding that discomfort is worth it IMO.
I suppose you could skip going to the dentist altogether but that comes with risks of larger issues down the road.
