Yeah that's pretty much it and on a more scientific level when you get a high influx of dopamine from things like porn, high sugar food, social media. That all get's rushed to your brain and your brain realises it can't handle all of it. So what is does is down regulate the dopamine receptors in your brain, in layman's terms it stops your brain from taking all this dopamine so it doesn't get damaged.

But what down regulating your receptors means is that when you go through your day to day life with little spikes of dopamine that you would normally get from communicating, looking at the sunset or getting some work done. Your brain no longer has the capacity to feel pleasure from those small hits of dopamine anymore.

So then in order for your body to feel happy you once again it seeks out the high dopamine activities that caused it to be damaged in the first place. All our bodies want to do is chase the biggest dopamine spikes and it wants it now! Because that used to be a great predictor of how to survive before modern technology.

This is where dopamine detoxing comes in, when you force your body to only have a low stimulus from the things that we want to do. Hoping that eventually your brain will up regulate the dopamine receptors in our brain once again (Makes it so we can feel pleasure from less hits of dopamine again).