I agree that the demographics are probably correct, but we're not supposed to assume that all individuals conform to group stereotypes. And that ought to be doubly true when we're not selecting those individuals at random, but we're (putatively) selecting them for their wisdom and other skills.
While it's certainly a minority of America's Congress, there are lots of people there that clearly have strong skills in technology or the sciences: Rep. Bill Foster (D-IL), Rep. Chrissy Houlahan (D-PA), Rep. Jay Obernolte (R-CA), all of whom are over 50 years old, just to name a few.