How accurate does a laser level need to be for DIY versus pro use?

Specialist subreddits note that ±1/8 inch at 30 feet (roughly ±3mm/10m) is plenty for framing, tile, cabinets, and most renovation work. Pros doing grading, drop ceilings over long spans, or commercial layout typically want ±1/16 inch at 100 feet or better, which is where rotary lasers like the Topcon RL-H5A live.