> It’s not “arbitrary.” It’s raising rents for the same reason rents are ever raised: people’s willingness/ability to pay has gone up.
The only landlords who can afford to operate this way own many, many units. A long term tenant who pays in a predictable manner and isn't actively damaging property is worth their weight in gold, and you can't afford to roll the dice on the next tenant unless you're able to spread the risk and cost of the churn around.
All rents are set by the market's willingness and ability to pay.
No matter whether you're the 40th percentile (a vacancy-sensitive landlord) on price or the 90th (a vacancy-insensitive landlord), the dollar value of the underlying distribution is defined by the market's willingness and ability to pay. If that goes up, the entire distribution moves to the right.
The only landlords who can afford to operate this way own many, many units. A long term tenant who pays in a predictable manner and isn't actively damaging property is worth their weight in gold, and you can't afford to roll the dice on the next tenant unless you're able to spread the risk and cost of the churn around.