It's simple, really. They have this section so we can find other people who share our interest in Lawrence Welk.
OK, just joking. Yes, there are changes in body chemistry. But there are other things I've learned in this forum.
First, the people here have maturity. Our bodies may be slowing down, but we're growing wiser and smarter about training. In my case, I'm actually making the best gains of my life, simply by getting rid of all the crap that doesn't work.
Nobody here says "Give me a program". We know enough to get started and seek advice only to stay on track. We have the experience to figure out what's going on.
Second. we have similar conditions. Many of us have families, children, careers, and so on. How do you train and stay healthy with so many things taking your attention?
Hope this helps.