I passed interviews for two production jobs, but I'm still torn

I am moving from self-employment to a production role at a relatively late age in my mid-30s.
One is with a company called Zeniel, which is a subcontractor for Doosan Electronics,
and the other is Ajusteel.
The first one is a small factory located next to the Doosan Electronics building.
The workload and working environment are good, operating on a 3-shift/3-rotation system with 6 days on and 1 day off.
Early starts and overtime are taken for granted, and Sunday shifts are supported (except for the night shift).
The monthly pay, including overtime, is around 3.5 million KRW after tax, and about 4 million KRW if working on Sundays.
The second one—I don't know the exact salary, but depending on the assigned plant,
it operates on a 3-shift/3-rotation or 3-shift/2-rotation system, with plans to move to a 4-shift/3-rotation system later.
Since it is a steel company, the working environment may be harsh and the workload could be dangerous,
so it is a place where you must always prioritize safety.
Perhaps due to the merger/acquisition involving Dongkuk CM, they are trying to align their welfare benefits with larger companies.
Unlike the subcontractor mentioned above, they seem more systematic, from the interview process to new employee training.
When searching various websites, I only see posts saying "Never go to that steel company,"
but people around me recommend it, saying that a larger company would be better for future job changes
and asking if I couldn't handle it since I've done even harder work before.
Because I've seen those negative posts, I keep hesitating.
On the other hand, I have a 19-month-old daughter.
If I were alone, I would have chosen the subcontractor without a second thought,
but since I have a family and need to spend time with my daughter as she grows,
I wonder if it might be better to go with the steel company, where the concept of time off is more clearly defined.