Stick to the topic, guys.
The kimchi used in kimchi jigae is more ripe and fermented than raw kimchi, so it's easier for your body to digest it. This probably explains why kimchi jigae doesn't give you digestive trouble.
Kimchi contains a lot of nutrients, but it also has N-nistro compounds which are linked to gastric cancer. So, it's not a good idea to eat a ton of it daily. How about a little every day? If stomach cancer doesn't run in your family, then it's probably okay. Consuming it a couple of times a week for its probiotics definitely isn't a bad idea. The same goes for sauerkraut.