Just finished a re-read of 'Lookism' and this aspect always hits hard. The manhwa doesn't just show that good-looking people get treated better, which is obvious, it digs into the institutional power that comes with it. Daniel's two bodies are the perfect vehicle. When he's in his 'ideal' body, authority figures like teachers and cops automatically defer to him, he's assumed to be morally correct, and his social influence is immense without effort. In his original body, he's invisible at best, a target at worst. The real punch is how it ties to economic mobility; looking a certain way opens doors to job opportunities, networking, even personal safety, while being unattractive can trap you in cycles of poverty and abuse. It's a brutal commentary on how looks are a form of social capital, as real and spendable as money.
What's especially grim is how the series shows characters internalizing this. Some, like Vasco's crew, try to build power structures based on morality and strength that deliberately reject looks, but they're constantly fighting against the current. Others, like many of the bullies, use their looks as a tool for dominance, but their power feels brittle, dependent on the perception of others. The series makes you feel the weight of that dependency—it's a power that can be revoked by a scar or a bad rumor, which adds this layer of constant anxiety even for the 'haves.'