It is not up to you to decide where developers choose to build. Our inner-city is less dense than areas outside Loop 410. The medical center is the most dense area in San Antonio.
The La Cantera/UTSA area is prime because of the global headquarters, major university, name-brand shopping centers, and wealthy neighborhoods. The area is aesthetically more appealing than most others. You can rant and rave on this message board all you'd like. It will not make a difference.