Perhaps the simple fact is that most people are motivated by the need for social validation, and only a tiny tiny fraction of the population is driven instead by things like intellectual curiosity, desire to help others / solve societal problems, etc. So any class of activity that becomes open to a sufficient number of entrants will eventually turn into a form of conspicuous consumption.
Now scientific research is conspicuous consumption (MIT Media Lab?), book authorship is conspicuous consumption, and political candidacy is conspicuous consumption. Are there any activities left that doesn’t function as a form of conspicuous consumption?