Cast iron is great because its really heavy and stores heat so it's great for slow cooking, and you want enamel because it reduces maintenance (uncoated cast-iron absorbs what it's cooking which is why you never cook tomatoes in a cast iron skillet). Le Creuset are great quality, last forever, and are well designed which is why they command a premium.
The point of the article is that actually she doesn't want to make soup, she wants to be like the people in the videos she watches and the concrete immediate step to get there is by buying the tools they have. It's like buying a gym membership in January. You want to get fit, buying a gym membership is easy. Actually going to the gym is hard.
Anyway, I buy my stock in boxes from the big-box store and its fine. For me.
Look at the "rules" that people who live in 500k houses and drive 50k cars have for using and maintaining cast iron. Some 1930s housewife who was all out of fucks to give most certainly did not go through all those motions when she used an identical pan and it worked out just fine.
When GP says "good soup" he/she means soup you can show off (or bring the leftovers in to work as your lunch to show off there) as a status symbol. It may also be good in the practical sense (good tasting, filling, healthy, etc.) but that's secondary to the showmanship aspect of making it.
Want to start exercising? Gotta buy new $140 Lululemon tights to help inspire the action, because willpower isn’t enough.
Depends on how good the soup you want to make is. Look up “how to make tonkotsu from scratch” on YouTube and you’ll find videos of people prepping their soup 2-3 days in advance.