I was a mom who resisted the surgery for my child the first time when it was suggested a few months before her first birthday--she had already had non-stop infections for months at that point. I tried chiropractic, elimination diet, all sorts of different oil in the ears...and nothing made a bit difference. Getting the tubes changed my child 100% for the better.
When it was time to replace them two years later (after coming out on their own...only to have the infections flare up again) I was pushing the ENT to do the surgery that week...he wanted to wait and see. Two full courses of wicked antibiotics within four weeks and he was on my team.
There is NO guarantee that the infections won't continue, but they are 1) less painful 2) easier to detect and 3) easier to treat (ear drops instead of oral antibiotics). There are risks to doing it or not doing it--in hindsight it is always easy to think the other decision might have netted a better results. However, you can only act on the information you have today.
You will "go through this" much more than she will--she will only feel better and fast....like within 24 hours (barring any complications from the anesthesia).
I do like to share my own experience from my daughter's first surgery--I don't think it is typical, but you never know what people will experience. I was told she would be a "little upset" when she came out from the anesthesia...she was completely HYSTERICAL and I finally had to convince them to let me take her outside to calm her down promising that I would make sure she could drink something or I would bring her back. Also, my daughter had an active infection and, while they do suck it out, she had quite a bit of bloody discharge running down her cheek when they brought her out. Third, you'll have a script for post-op ear drops...make sure they give it to you at your pre-op appointment so you can fill it well before the surgery.
The second time around we had a new surgeon and a new surgical center. Even if I hadn't been experienced with it, their preparation level to the parents was at a much higher level. She threw up once from the anesthesia and that was it...she didn't even take a nap that day.
If you've tried other remedies and still it continues, I would do it. There is a physiological component to repeat ear infections--small or short or contorted Eustacian tubes. My mom still gets ear infections as an adult (she never had tubes) and I occasionally get them as well.
In children, they are usually asoociated with a cold...my daughter could have one without ever having any other symptoms. It is just the way she is built.
P.S. Just to add to the ear plug/no plug debate. Both our surgeons said that "dirty" lake/ocean water should ALWAYS have plugs if going to be submerged. I was told that the debate with "clean" water depends on the size and type of tube used. Second, we opted to go with a slightly larger tube in the hopes she would grow out of the infection before they came out. We do have to used water precautions,and it does increase the risk of a hole, but they also have methods for patching that as well.