Need is a bit of a strong word. I think I would advice anyone wether they have porn issues or not to try out mindfulness in the same way I would advice them to do physical exercise To me it's all about odds. Normally I like to compare a reboot to a path, but perhaps a sea voyage is even better. Some see reboot as a lineair thing, but the more I learn about it the more I start to see that it's a very dynamic process that can completely shift with changing circumstances. A lot of these circumstances are out of our control, but what we can do is learn to deal with these circumstances in a better way. There are several skills you can cultivate that help you with that. Mindfulness is one of them. It might not make you able to calm the sea, but it will make you better at keeping your ship steady.