It depends if your sole goal is to maximize your chances of winning. If that’s your goal, the difference between a great deck in the game and a deck considered far weaker by the community might just be a 5% difference in win rate. Something like a 53% win rate vs a 48%. This is a big difference if you’re trying to be the highest ranked in your region but in practice it means just 1 more loss in every 20 games.
If your goal is to play with cards you like, I think the power level is usually close enough to still have a lot of fun. I’m kind of biased of course. :)