My fishing method (on mobile) is to double-tap “Reel” or “Snag Counter” and then wait for the top bar to move. No need for counting. Just base your actions off of the bar’s movement.
As far as monster killing goes, I don’t know why you’d spam click when auto-attack has been in the game for years now.
Fishing ... you are correct, also, I don't play LS on phone, however the "BAR" moves in Pixels, and they can be Small or in Large amounts when you click "Reel", this also happens if you do NOT counter "Snag" ... all of a sudden, your Green bar is below 50% when you were at 75% in that "one Mississippi" second (or action)... however, if you were successful on hitting "Snag" at that timing... you get a 100% success and complete fishing. Woot.
As for Melee, casting in catacombs... people still do it, and new players need to be informed... thanks for agreeing.