Lucky strings of matches in match-3 games are reminding me of critical hits in RPG games.
Players love randomness and seeing big numbers. A smaller subset of players know that randomness usually works against them. A critical hit against a monster means that it died in 2 seconds instead of 5. A critical hit against a player character could be a one-shot kill from a monster that otherwise probably would not do any damage.
Playing Marvel Puzzle Quest, I sometimes get huge strings of chain reactions, 3s and 4s and 5s just falling into place and destroying the enemy. I was already 95+% certain to win that round, so it just sped things up a bit. It feels like the enemy gets them a lot more; I have seen columns of matches fall in repeatedly, so the enemy matches several dozen tiles with one move as yet another set of 4 reds falls in from off-screen. I am reasonably certain a careful accounting whould not show any advantage to the computer’s side; it is just far more noticeable when it happens against you than for you, especially since that random, 20,000 damage chain reaction pretty much is your 5-or-less percent chance of losing that round. I have had my entire team taken out in one round as the tiles just kept falling, matching, falling, matching, free turn!, use abilities, falling, matching, free turn!, falling…