Uncultured people tend to equate renovation to "simple destruction" - that is, all one has to do to renovate is place a couple of TNT blocks and detonate them.
See, it's not as simple as that.
I'd argue that renovation requires just as much skill as building, if not more than that, because renovation is more than just simple destruction. It attempts to impart a unique disorder upon an existing build to transform it into a new art form.
All builds on Minecraft start off orderly. By that, I mean that whether you have a mansion, treehouse, or even just a flat expanse of land, each block is placed with the intent for the entire build to resemble something familiar. We cling onto such builds since they remind us of something in our own world, and adamantly refuse to appreciate builds that don't follow this rule. The role of each individual block placed dissolves away as one looks at the "big picture" that the entire build conveys, rather than each and every single block. Even the natural terrain generation of Minecraft obeys this rule - without a proper algorithm for randomly generating the terrain, you're left with something that doesn't resemble the earth and its many orderly structures, like mountains, rivers, and so forth.
However, renovation goes beyond appreciating builds for what they assemble by intensely deconstructing them down to their very building blocks. When one renovates, they introduce a disruption of the nice orderly fashion that builds tend to, and by doing a new, entirely unique art is discovered. Each block of the newly renovated build, which previously served to "complete the big picture", is now isolated from each other and contribute to the idea of a build much more than they have before. You can look at a renovated build and understand that there used to be a mansion or an underground base here, but you can not deny that you only perceive the floating blocks that remain. In the stretch of void that you see in front of you, you don't see order or something familiar. You see chaos and disorder; something which is unique to be seen in Minecraft builds. And suddenly, you realize that there's an innate beauty in renovation. Anyone can build a giant mansion or tower if they put enough time in it, and the build itself is easy to appreciate. However, renovation demands great effort and skill to execute and convey the sense of true chaos.
This, by itself, shows that renovation is a truly beautiful art form - one can not simply "build" chaos in creative mode, because to truly renovate something, you must have something orderly to disturb beforehand. The combination of the builder's work with the renovator's skill, an act similar to a renovator's version of the Great Work, purifies the builder's leaden creation into a "golden" chaos that we all must seek and learn to appreciate.