I had a small “burn” from laser recently (the result of doubling back over an area accidentally), and it was no big deal. It was like a sunburn or a little worse, and it healed in less than a week perfectly. I would assume that most laser burns are like mine, and that the big burns mentioned in this thread are rare compared to the total number of treatments given. When a laser tech says you might burn someone eventually, I think they mean little owwies, not disfiguring scars.
Conversely, the red marks from electrolysis take weeks or months to fade (much longer than my laser burn). This is par for the course, and makes my skin look worse than the laser burn did, for example. Unlike a laser burn, the electrolysis marks happen 100% of the time for me. That makes them way more inconvenient than any risk from a laser. As much as I love electrolysis, laser leaves my skin in gorgeous condition compared to even the best electrolysis treatments.
I’m just adding that info for a little perspective so that laser doesn’t get such a bad reputation.