What are the advantages of the electric part in the Hyprid?

My basic question is: What does the electric part really bring in the prius? If this question has already been dealt with in detail, I ask for the corresponding thread. My thoughts: The e-drive can only bring something in the city, since it is very often braked there and can therefore be recycled. However, since the battery is very thick, it should be used for longer periods of time. On the highway I think the e-part should be a real one because of the weight. I could imagine from the so-called, that the prius without the e-part under certain circumstances would have to be even more economical than with the e-installation. I just can’t get rid of the feeling that this “futzi and chucky” battery capacity vo n only 1500 m distance is only cosmetic. Ask for an emotion-free and objective discussion. lg