Meniscus question and surgery..?

I partially tore my meniscus a while back (about 3-4 months ago) and my doctor recommended physio and no surgery to heal it. my doctor said that it could even take 6 months to a whole year for it to heal. Is this complete bullshit or is this true? or would surgery be better for me? I have a little bit of a locked knee as well. (can't straighten fully but very close).