An objective issue would not be influenced by opinions. Infrastructure, for example, is objective. I would consider lack of infrastructure a good reason to deny development rights in a certain area. The same can't be said for "vistas."
Some vistas are objective. They're the product of professional planning principles. Some are clear achievements in urban planning. It can be objectively stated that they make an area unique and are remarkable by comparing them to similar areas but without any significant vistas (or, of course, vistas that were destroyed).
Of course, part of the appeal is subjective: a vista may be seen as beautiful and culturally and historically significant. Those are valid subjective reasons, and most decisions are subjective, including whether infrastructure can handle the increased strain of development. For instance, some will argue that most of the new residents of a project will take transit, while others say that the roads will be congested to a standstill. Some say the existing sewers are inadequate and hence limitations are necessary, but others would say that increased population is good and the city should take every step to accommodate it by expanding the sewers.
A city with remarkable vistas is one step closer to beautiful, and beauty pays. But if you're inclined to disagree about the subjective merits you can't deny what you see: a conscious effort being made to shape the city in a way that makes certain buildings stand out in an unusual way, high-quality building with investment in architecture. There are even objective reasons for such planning in certain cases, such as increasing visibility and/or the appeal of an area, and establishing the preeminence of an institution.
Our lives are centred around subjective decisions and so is the practice of great city-building. People put thought into the furniture they buy for their homes and how it's arranged if they're in a position to do so. People spend their lives in a city, making certain sacrifices to live in an environment with beautiful public spaces. It becomes a part of their identity, something meaningful.
But maybe you don't care about that. My belief is that that's simplistic and leads to generic cities the likes you probably wouldn't pay to visit or spend time in or care much about, but the vista is physical, it's the work of professionals, and anyone can see the objective impact it has on the street. It's not something abstract or imaginary.