Obviously this post is prompted by the announcement of Lia taking an extensive mental health break, and it's hard to not make parallels with Mina and Jeongyeon, who are also female idols from JYPE. Of course correlation does not imply causation, but it's hard to believe that it's a coincidence that two girl groups from the same company who have had a long history of overworking concerns are having the similar issues with mental health.
This subreddit has a tendency of dismissing the "being overworked" claims, but it's not hard to see that ITZY's schedules are way busier than their peers'. Even using the latest comebacks, 'Cake' had a full 5-week promotion cycle on music shows. Aespa did only 2 weeks with 'Spicy' and (G)I-dle did 3 weeks with 'Queencard'.
Rookie girl groups usually do longer promotion cycles because they need to get their names out there and gain as much recognition as possible, but even they rarely do so many weeks. Both IVE and Le Sserafim did less than 5 weeks despite promoting 2 songs ('Kitsch' and 'I AM'; 'Unforgiven' and 'EPTBW'). The only other group this year that I remember who are having such long promotion cycle is NewJeans, but they went only to 2 music shows a week and promoted a lot of different songs. From the recent comebacks Somi did 4 weeks (3 for 'Fast Forward' and 1 for 'Gold gold gold').
Since July last year ITZY have released 3 Korean albums, 1 Japanese single, 1 English single and did the world tour. They are also releasing a Japanese album next month. There is no reason a girl group in their 5th year should have a more packed schedule than rookie girl groups.
Both physical and mental health issues tend to snowball and stack up without the proper down time for rest and recovery. Even world class athletes need off season for that exact reason. It just feels like JYPE have learned nothing from Twice and are making ITZY go through the same grueling schedules until someone drops out and has to take a break.