Note this works both ways. If the market goes down, if no one wants to live there anymore, tenants have a lot of room to negotiate. Vacancies are expensive and the hassle of getting a new tenant is not something many people want to handle even in good conditions.
I also contend that not all markets make this easy. I rent a single family home in a town of 4,000. This is not a super liquid market. There are not a lot of good comps - my house is a block from the town’s best park, and walking distance to the small downtown. On the other side, it is a substantially smaller lot than the average house. There are essentially zero houses that are equivalent, and I have to do a lot of digging (including calling up other folks I know that are landlords) to figure it out.
My tenant is not on the verge of financial collapse. They’re a manager at a local business, they probably spend about 20% of their gross pay on rent. They have demonstrated an ability to absorb the bump without issue.
It is well known that most people can not afford significant sudden expenses. I think the inability of some folks here to recognize how bad a 4 year rent hike can be have the privilege of not being in that group.