Imagine two boxers competing in the long bout. The one is leading the fight, winning each round by points, but still fails to finish with KO. What is the logical end for the fight then? Yeah, the winner is that one who has more points, earning them during the whole match. And now just imagine that after the end of 11th round announcer says, "SD, bitches!" and discards their points. So then few lucky punches in round 12 may decide the whole match! Lame? Sure, it is.
I still not to understand why you think that 1hp SD reduction is a lucky based thing.
This:
you may calculate the time when round timer turns 0, but still SD may come that turn or the turn after that.
Even without health reduction this is still as you say a "luck element". If your one of the few players who manage to sucessfully count the round time down to 0 and are expecting the water to rise and plop a worm on the floor, yet SD comes a turn later and the worm survives, that is also unlucky right?
Players are not always rewarded for succesfully scoring points for the duration of a game, the game isnt over untill its over and both players are aware of this. Both players are also aware, that if there has been no "KO" after a certain period of time, then it will come down to SD. You could compare this to penalties at the end of a football match. Even if one side seemed to dominate the game for the whole 90 minutes, yet had not managed to "win", then it would all come down to a few shots at the end of the game.
The thing is, when players are aware of the fact that there will be health reduction at SD they may prepare for it. Reduction at SD can really shake up the gameplay and forces players come up with appropriate strategies in order to secure success. In my opinion it makes the scheme even more exciting, intresting and skilfull.
On the otherhand I can understand why people would prefer not having reduction, but it comes down to nothing more than personal preference. The only reason you seem to think it so "lucky", is that "you can count down the round time to 0, yet sd can come on the turn after that". If this was such a big problem then the top inter players wouldnt have winning streaks in the numbers they do, seeing as your more than likely to come across a situation like this say every 10 games...