It is absolutely normal to wonder whether you could manage without. And you could, as you would have had to before resurfacing was developed. My father had bad hips from his late 40s and was 56 before they let him have THRs. His life completely changed, he had been reduced to spending his time sitting in a specially made armchair.
That's why I went looking for my first when I was about 50, I did not want to waste all those years. Fortunately the BHR had come along and my 50s were great. Fourteen years on, the joint is till perfect, apparently and I got the other one done last week.
I know you are even younger, but if they get it right, the joints do seem to last at least fifteen years, probably a lot more. And the outcome is so good. So there is a huge upside to having it done. You just need to stack the odds in your favour by getting a really good and experienced surgeon.
As to infections, Mr McMinn never told me to take any special precautions when going to the dentist. I am on antibiotics for a couple of weeks following the surgery, because I needed a catheter for a while.
I was very nervous before my first and considered getting up and going home. I am very glad I didn't. All the best for yours. Keep us up to date.
David