Saying that Takopi is realistic is like saying that Oshi no Ko is realistic. A mistake. Look at pic related. These are the kind of visual choices you typically see in battle shonen, usually when the villain is talking, made to shock. Realistic works don't want to shock.
>Does this mean that only realistic things are good?
Of course not. It means that Takopi is not realistic and trying to use this term to defend its quality is wrong (also because not all realistic works are good either).