Having a new series of downs is overrated after you've given the ball back to your opponent and have given them a chance to score. You might get that new series of downs after they hung 7 on you. It seems way better to just get a new series of downs by making a play to gain the yardage you need and never giving your opponent the chance to score. Punting in the hopes of similar field position for a new series of downs later in the game is just another way for coaches to justify conservative thinking. It spreads out the number of chances that if something goes wrong on a single play, they've got other plays to compensate. That's not great. Basically coaches say they prefer having 3 chances to go 10 yards, instead of one chance to go 4 yards or less usually. Which is weird - the average play nets much better than that. You will get what you need more often than not. I get that hitting people and tackling is what makes football fun to play, but strategically, playing defense should be a last resort. You're conceding control and positioning yourself to be reactive instead of active. You can't score without the ball. Coaches love being afraid of the ball.