There is a difference in levels of acidosis. Yes, the body will try to maintain a reasonable level of alkalinity but when the body has to work beyond its normal effort to stay alkaline, it is sufficiently acid that damage starts to occur.
The truth is that each cell in the body has an optimum pH. At any poiint that the body starts to drop below 7.35, there is a price that is paid. One price is the slowing down of the immune system. This allows the build up of numerous minor problems that can slowly erode your health over time.
It is wise to ignore the stodgy experts that tell us that only someone who has extreme acidosis needs to worry. If your early morning urine is acidic, it means that your kidney are having to pump out the acidity almost 24 hours a day continuously. There will be a toll to pay.