The 'general' package has basically fixed that for me:
https://github.com/noctuid/general.el
Makes it pretty simple to swap out most common emacs shortcuts for much more ergonomic alternatives.
You can ban them for yourself by monitoring your own internet use, deleting mobile apps (and/or disabling notifications) and reducing news consumption in general. All of which are pretty solid protocols for most people to follow 365 days / year, actually.
I'd check out Leechblock NG (for Firefox and Chrome) if you need a short vacation from Lemmy or any other websites.
I have to navigate my city's public transit system every day, so mobile internet has been a game changer for me personally. Thanks to that I'm able to check live arrivals and see which station it makes more sense to walk to in my neighborhood, or figure out exactly when where to switch lines (also based on live arrival times), etc.
Having access to streaming music doesn't hurt, either. IMO it really just comes down to not installing dopamine slot machines (e.g., basically any social media). Keep the thing simple and utilitarian