This is a joke ntended to illustrate the sometimes absurd oversimplification that has to be made to do certain calculations. An apple falls out of a tree from 20 feet off the ground, how long does it take to hit the ground. Well, what is the drag coefficient? Assume it's a sphere. OK, what about the texture, the air temp, wind, is the ground level and flat, etc etc. And as the problems increase in complexity the number of variables increases exponentially. So your professor might tell you to "Assume it is a spherical cow of uniform density“.
Often these estimates are actually quite good and trying to account for all variables isn't needed.
Completely agree.
The landlord is a piece of shit.
The system that drives people to act like pieces of shit is a bigger piece of shit.
And I definitely think the landlord can both be acting rationally and be a piece of shit. I also don't place all the blame on the landlord, and even though anyone with a 10k plus apartment for rent has WAY more money than me they and I are likely in basically the same boat when compared to the actual capitalist class.