I think the middle paragraph of this comment is a very good point, and could easily be enough to justify the law. (The tenants has nowhere to go if the landlord gets pushy or aggressive.) However, the last paragraph I think is a bit uncharitable. The OP makes no secret of the fact that they have a certain class of laws/​restrictions that they are arguing against, with this being just one example, and that loophole is specific to the example.
I think the middle paragraph of this comment is a very good point, and could easily be enough to justify the law. (The tenants has nowhere to go if the landlord gets pushy or aggressive.) However, the last paragraph I think is a bit uncharitable. The OP makes no secret of the fact that they have a certain class of laws/​restrictions that they are arguing against, with this being just one example, and that loophole is specific to the example.