Majority of us here are aquarium normies.
Examples:
Keeping aggressive fish, that have the potential to kill each other or kill other peaceful tankmates, in the same tank.
Keep certain types of fish because they're fashionable/trendy at the moment. Avoiding keeping fish that may make one look inexperienced/newbie.
Time and effort on fish is determined by the fish's rarity/price tag.
Preference for brightly coloured fish as opposed to being interested in fish behaviour.
Breeding fish for the sake of achievement, even if there's no where to house the young or the prospects of re-homing them is unknown....
All these are so common in the fish keeping world, that they are accepted as the norm....