@40
"if someone shouldn't study openings, what should they spend their time doing?"
++ Play, analysis of lost games, study of grandmaster games, endgame study
"why would spending 90% of their time of puzzles and principles, and 10% of their time on openings make them a worse chess player?"
++ It is 10% of time wasted. The studied openings lead to misunderstood middle games. If you need opening study to avoid falling into traps, then how will you avoid falling into middle game traps.
I guess I am just wondering if someone shouldn't study openings, what should they spend their time doing?
Just puzzles, and principles?
If that is the case, then why would spending 90% of their time of puzzles and principles, and 10% of their time on openings make them a worse chess player?
10% would be fine. However, it seems that beginners like to spend 60% of their time on openings, and often just memorize moves without understanding why those moves are played.
being a beginner teacher and teaching my brother the vienna was a mistake. What ended up happening is that he memorized the moves and not really the plan. Luckily, he also agreed that memozing it was pointless and he switched to the scotch. and all he knew was push the d4 pawn and figure it out from there