I lived here my entire life, I know where Sterling is and how it's a 15 minute drive from there to Chantilly (which is not in Loudoun County btw).

Take a look at this map here: https://www.loudoun.gov/DocumentCenter/View/171141/2022Elect...

Ashburn is not literally just one shopping plaza. It's a giant area zoned into different parts of datacenter, suburbs, and commercial sections.

Even forgetting all of this, just type "restaurants in Ashburn" into Google Maps see the plethora of results.

Just because someone has some imaginary boundary of what constitutes as Ashburn doesn't make it definitively small.