I just turned 30 so I got really introspective as you do, questioning my life. And when I stopped and sort of looked back at the past decade, I realized I had done more work than I thought I had done.
There is no age, height, or weight requirement to skate. It is good exercise no matter what your age is. If you want to be competitive, most start young. But, I practice with many adult competitors.
One of the surest signs of the Philistine is his reverence for the superior tastes of those who put him down.