Not at all. That's just the median age, and I think the profession tends to have a lot of young people due to the size of the field at the time people chose their careers.
Even better, looks like there are a few programmers (CPP and HTML) >60 years old, though the graph shows n=0 for those data points, so do those guys actually exist? If so, the oldest programmer is 86.4, now that's impressive.