That's saying let's destroy the smaller pyramids near the Pyramid of Giza because we still have the Pyramid of Giza.
Or, let's destroy that one hill with carvings in it, we still have Mount Rushmore.
You see, people worked hard to build these things. Mayans worked HARD to build this temple. Again going on the respect thing, we have respect for these temples because people worked to make that temple without any of the construction machines we have now. It survived ALL these years, showing off Mayan hard work. If someone destroys that to make a ROAD, that's all gone to waste.