From Healthline:
How is runner’s knee treated?Your doctor will tailor your treatment to the underlying cause, but in most cases, runner’s knee can be successfully treated without surgery. Most often, the first step in treatment is to practice RICE:- Rest: Avoid repetitive stress on the knee.
- Ice: To reduce pain and swelling, apply an ice pack or a package of frozen peas to the knee for up to 30 minutes at a time and avoid any heat to the knee.
- Compression: Wrap your knee with an elastic bandage or sleeve to restrict swelling but not too tightly as to cause swelling below the knee.
- Elevation: Place a pillow under your knee when sitting or lying down to prevent further swelling. When there is significant swelling, keep the foot elevated above the knee and the knee above the level of the heart.
If you need additional pain relief, you can take certain over-the-counter nonsteroidal anti-inflammatory medications (NSAIDs), such as aspirin, ibuprofen, and naproxen. Acetaminophen, the active ingredient found in Tylenol, can also help. You may want to talk to your doctor before taking these medicines, especially if you have other health conditions or take other prescription medications.
Once the pain and swelling has subsided, your doctor may recommend specific exercises or physical therapy to restore your knee’s full strength and range of motion. They may tape your knee or give you a brace to provide extra support and pain relief. You may also need to wear shoe inserts known as orthotics.
Surgery may be recommended if your cartilage is damaged or if your kneecap needs to be realigned.
I wouldn't think they would just rush into surgery without trying conservative care first. If they did, I'd be looking for a different doctor.