Level 53 player here, and what I've been noticing a bit playing against players ranked higher than me -- and I totally get this -- is that the banned/disliked cards are typically cards that have significant swinginess based on shuffle luck and timing like Tournament.
You can't totally prevent swinginess: I lost a game against a chap 10 ranks below me who went first and got to open 5/2 with Cultist on board, and had two more Cultists by turn 5. But there's some cards that are a lot more likely towards it.
I guess my point being, banning/disliking certain cards may not be about lack of skill, but rather wanting to make sure that the skill/luck ratio is more a 70/30 or 80/20 proposition in determining the winner rather than closer to 50/50.
You can't totally prevent swinginess: I lost a game against a chap 10 ranks below me who went first and got to open 5/2 with Cultist on board, and had two more Cultists by turn 5. But there's some cards that are a lot more likely towards it.
I guess my point being, banning/disliking certain cards may not be about lack of skill, but rather wanting to make sure that the skill/luck ratio is more a 70/30 or 80/20 proposition in determining the winner rather than closer to 50/50.