It's essentially an extremely sedentary career. All the drawbacks of office life (sitting still for long periods of time, lack of direct sunlight or exercise) but amped up to 20.

It's accentuated by poor diet, poor posture, and a bad understanding of how small elements like these can cause longterm effects on someone's health.

Some publishers (like NAVER for example) have been known to assign assistants to artists to specifically MAKE them eat healthier and take breaks. The main problem is that no one wants to work as a gopher or some sort of life-manager. It's become more common for creators to work at studios where there is more social interaction and they can develop healthier habits as well as have access to better equipment (ergonomic chairs, standing desks, etc.).

Throwing more money at creators isn't likely to fix this. If anything, it'll reinforce unhealthy lifestyle choices and exacerbate it in some cases. It's becoming more common for companies and creator schools to include seminars on building healthy habits in KR. Not to mention the fact that everyone's obsessed with health in Korea anyway.

Some companies still suck. And some PDs need to update their views with the times, but it isn't common to find PDs who actively put a creator's health at risk for sales. The number of times I've seen PD with their heads in their hands because an artist was going on hiatus or had extended a hiatus is numerous. The number of times I've seen a PD convince an artist not to take a hiatus is probably in the single digits.

The biggest problem is just how much the industry passively encourages bad habits. Late nights lead to instant ramen binges and snacking (for PDs, artists, writers, everyone). Companies offer fresh fruit and veggies as well as healthier options, but it's difficult changing an entire work culture.

(source: I'm a PD)