>>47665517It's because when you're low elo, you can't think past the immediate turn, lack any assessment skill, and think their opponent is always dumber than they are.
In this case, when someone says something like "Just use Trick Room to beat Cloyster", they immediately assume your opponent could not possible guess that your team of slow, alright bulk, but hard hitting Pokemon has Trick Room setters, or that your Porygon2/Hatterene/Slowking were the Trick Room setters.
They also assume Cloyster won't have any teammates despite the meta being a 6v6, so the prospect of Cloyster switching out to one of its partners is completely lost on them. Similarly, they think Stealth Rocks and Spikes just magically appear and disappear midgame when coming up with theoretical counters. There is no such thing as Defog, hazard setters, or the metagame of hazard setting that plays during a match.
There is more to this "metagame" before Cloyster could start sweeping too that /vp/ doesn't understand. They think that you're always going to have multiple counters in reserve like Melmetal, who would never be used outside of checking Cloyster (who can still be flinched to death if they are lucky). Melmetal will not have the job of checking anything else during a match, which seems dumb since it makes the game effectively a 5v6 (eventually a 4v6, 3v6, ect. as your opponent takes advantage of your refusal to use a bulky steel type that hits hard) up until the check they are looking for is required.
And back to just the 1v1 scenario of your Hatterene vs your opponent's Cloyster, the opponent, 100% of the time, will not only stay in immediately, use Shell Smash against a Special Attacker with Trick Room, and then stay in against Hatterene under Trick Room as well, obviously. The best case scenario will always happen during a hypothetical match.
And lastly, not playing the game means you don't play with OP Pokemon, which means that all their counters are hypothetical instead of practical.