I visited Lake Titicaca in April 2016, crossing from the Bolivian side into Peru one afternoon, then visiting the Uros Floating Islands the next morning before leaving. While the experience was admittedly brief, I can say that I was able to experience, and therefore compare, both sides of the lake (wrote a review on Bolivian side a while back, kinda cringe but y'all can check it to see my complete opinion anyway). While I agree that the Bolivian side, with the Islas del Sol y de la Luna, packed more of the authentic cultural-heritage-site punch, along with an overall more pristine environment, I can't really see the two sides as separate. Naturally, they form a single lake, one of the most pristine for its size, simply separated by arbitrary political boundaries. Furthermore, the short experience I enjoyed at Uros did make me realize on a deeper level how interconnected the people of the lake are with the lake and the natural blessings that abound in it, such as the tortora reeds that thrive in the shallow areas near Puno (among other areas of the lake, but these were the ones highlighted in my trip: you can see the boat paths in their midst in the attached picture); these reeds aren't just used to create the famous floating islands at Uros, but they are also the building blocks for the people's houses and boats, as well as a healthy hydrating staple food. While the islands are now very touristy, we can't deny that they have a super unique, rich, and living culture that needs to be protected. And while they can't necessarily be considered immovable or even fully tangible heritage, the way the culture is shaped so distinctively by the environment and vice versa makes for an amazingly rich cultural landscape. Thus, I fully support the further preservation and recognition of the lake as a whole, a site of outstanding cultural and natural heritage.