They may have more flavor but there is an increased risk of food poisoning or stomach issues later. On the other side of the argument, this comparison only works with higher-end restaurants as the image appears to be alluding to. Food trucks can be and often are better than restaurants that just don't give a damn because food trucks are generally works of passion. The problem is that it is really hard to keep a mobile environment sanitized.

Assuming you have enterprise software that actually has a budget and isn't driven by suits then dedicated roles will get you superior software that can last a long time almost every time.

Full stack is also slightly dangerous since you can silo entire features to a single person. The same can be said to dedicated roles depending on the setup, but the points of failure are much narrower if that one guy wins the lottery or is but by a bus.