Given the popularity of site-blocking apps like SelfControl, Freedom etc, yes, many people do need help with this. I don't use them, but I go through quite wide swings between ignoring many distractions to get work done to having trouble getting work done because of all the distractions (just plotting my HN comments alone would probably yield a nice sinusoidal wave).

And I absolutely use a choice of work space to help mediate this. When I used to freelance I had to get out of my apartment and work at a coffee shop to really start my day. Now I often have days where it's fine to work from home, but when I find myself completely distracted from work while at home I go into the office because it's just slightly less acceptable to be goofing off all the time there, and that's just the nudge I need to get into my work for the day.