Do people run the ENTIRE time during their long run?

Lol I just posted in here a few minutes ago- BUT it had me thinking something else. Do you guys run the whole way on your long runs? I once was told by a coach you should run the entire way, however I see quite a few running influencers go out on X miles of a long run and stop a few times for bathroom breaks, water breaks, or just a break in general. Are you hurting your progress stopping for a break?