[Orthodontics] Review of asymmetry correction without extracting one molar

I looked for a single director + someone who has been seeing only 'orthodontics' for more than 10 years in the same place. Since orthodontics is a process of slowly adjusting the smile and alignment that you want, communication with the doctor is important. The director here is very kind and communicates well. I have one of my lower left molars that is completely decayed and has undergone root canal treatment, so he said that it is impossible to move it while undergoing orthodontic treatment. Other hospitals suggested that the molar be pulled out (???? It's a permanent tooth???) and others that it should not be pulled out at all, but the director said that if it is for cosmetic purposes, it is inevitable to pull it out because space is created by pulling it out, and since molars should be used as much as possible, they pulled 3 out and made them asymmetrical. When I went to another dental clinic for a short time, they said that they did it in a difficult way. Now, I have braces and go to the dentist often^^