All of which drive up costs per installed megawatt. You’re talking about marginal (as in, in the margins), which can produce significant power - but is expensive and has side effects on habitations that many people are currently willing to overlook but won’t be the case forever.
Racking and wiring is one of the dominant costs in any solar installation, and a big flat desert is cheaper both to install and maintain than almost every other option by a pretty hefty margin.
As far as I can tell the “side effects” are beneficial synergies - I love having shade in parking lots for example. You should also be saving on real estate costs if you already had a primary use for the real estate.
Maybe the solar cost efficiency taken alone is reduced, but the system efficiency of the real estate use goes up as does the ownership value for the property owner.
Racking and wiring is one of the dominant costs in any solar installation, and a big flat desert is cheaper both to install and maintain than almost every other option by a pretty hefty margin.