Your level of arrogance and condescension is amazing for someone who clearly knows so little.
Again, it’s not the “wrong” side for a lot of players, especially Russian wingers who often prefer to play on that side as it gives them different options offensively. It certainly doesn’t seem to be holding Kucherov back as he continues to be the leading scorer in the entire NHL. And again, while Sergachev may not be a winger he is an offensive defenseman and playing on the opposite side gives him the same advantages.
Maybe you should try learning a thing or two before pretending that you know better than everyone else.
Actually, I would like to copy and paste that first sentence back at you.
How can you compare a forward playing on either side with a D being used on the wrong side? How many of the top 30 Ds in the NHL each of the last 5 years have played on the wrong side, or "off" side as you want to call it? 1-2 per year? Why is that? It sucks to have a D on the off side in so many areas. That D has to make huge adjustments all the time. So often that D needs to turn his back to the ice and play the puck with his back-hand. There are advantages of course, but they don't make up for the disadvantages.
Look, I don't fault you. I hear these type of claims all the time. But if you are interested, keep track of a situation. The result is like 49/50 times the exact same thing, it don't hold up long term. The player on the wrong side starts to struggle and so forth.