Everyone’s situation is different, but since you asked for others opinions, here is what I think.
I wasn’t given statistics like yours. If I had been given them, I suspect I would not have had chemotherapy because it’s hard, can sometimes have long term negative consequences and 1% doesn’t seem a big advantage. I might take into account my age, if I was younger with young children I might do chemo whereas if I was much older with grown up children, I wouldn’t.
I took tamoxifen, a hormone therapy, for two years. Then my oncologist said it was ok to stop taking it, because the advantage of taking it from that time was, for me, very slight, so I promptly stopped it. This is not the case with all women, but it was for my situation. I felt, and my husband agreed, it was worth taking a slight risk, at age 63, because we hoped it would improve my quality of life. Which I think it did.
I also wonder is it worth getting a second opinion from another oncologist?