I have had sinus surgery three times in my life, each time to remove nasal polyps that were completely obstructing the airways.
The first surgery (around '91) was freakin' brutal, and the polyps grew back a year later. The second surgery (around '92) was significantly more effective, and - in rudimentary terms - a scope and a snare was used. The recovery was also less grueling, and did not require hospitalization. The third surgery (around '98) was better still, and - again, in dumbed down lingo - a scope and tiny auger was used.
Point is: over time, the surgical technology improved, the recovery time/effort was better, and the effectiveness increased. (Side note: I suspect my first doc was totally incompetent, though.) Hell yes the surgeries were worth it. I had no good alternative as the polyps grew and made it difficult to breathe.
These days I can get by with occasional use of a steroid spray to shrink the polyps. Hopefully I won't need surgery again for many more years.