Why do all apartment complexes in Albuquerque have pools? Apartment builders have a constrained optimization problem whereby they balance building different amenities to attract tenants with varying preferences. Recently when searching for apartments I noticed that every single apartment seemed to have a pool. I feel like many people would prefer a small decrease in rent and open space, more parking, a larger fitness center, ect to a pool. Apartments have many other variances in terms of parking, landscaping, price, ect, yet the pool seemed to be a universal. Does this simply reflect that the apartment market cannot be perfectly competitive or that preferences for pools is near universal? Is there an economic explanation or cognitive bias that would explain this kind of convergence?

PS: I will not be offended if this is closed. I'm not sure if this type of question is not on topic for this site.
In most places, it's probably more efficient to invest in more houses than to put pools for the same value in the houses you own. In some place, having a pool might even decrease the renting value of your house: the maintenance cost compensate the rent increase. In Albuquerque, it is possible that it's more relevant to invest in pools than in houses, hence all landowners invest in pools, hence, no more houses to rent without a pool.

With $P$ the cost of a pool, $H$ the cost of an house, $r_H$ the revenue you get for renting a naked house and $r_P$ the revenue you get for renting a house with a pool and $c$ the upkeep of a pool, every house owner is going to build a pool before renting or selling if $$(r_p - c)/P &gt; r_H/H$$

If this isn't true (and it isn't in most places), some people we choose to build a pool for other reasons but not all houses will have pools.