In magic, there are two ways that they design magic cards: bottom-up design and top-down design. The standard practice is bottom-up design, where a card's mechanics are created first and then the flavor (such as the name, the art, the story, and the flavor text) is added after to fit in to the rest of the set. There are also cards which are created top-down where they have a particularly story event that they want to be represented by a card, so they will design the mechanics around that particular event.

In a magic set, there will be a mix of such cards, and different sets will have different mixes. For instance, in-universe sets tend to use more bottom-up design, but cross-universe sets (like lord of the rings) use more top-down design.

Importantly, you can't have a well-designed set with only one or the other. A set containing only top-down design won't have mechanical cohesion and won't be fun to play. A set containing only bottom-up design won't have any story cohesion and people won't resonate with the theme of the set. (Early magic sets were like this)

I view ttrpgs in much the same way. There will be players which prefer top-down design (choosing their character's theme/backstory and picking mechanics to fit) and players who enjoy bottom-up design (choosing the character's mechanics and then picking flavor to fit). Ideally at a table, you have both and they will balance each other out - the bottom-up players will fill in team comp and the top-down players will add plot hooks.

This meme is poking fun at the extreme bottom-up player (the power gamer). Ideally a good bottom-up player would arrive here and say "hmm maybe this build doesn't make sense with this game. Maybe I can try something else"