Is a camera rental company just "renting out cameras they don't need"? Maintaining rental properties is a livelihood, a bad faith tenant is just as abusive as a bad faith landlord.
People buy properties on loans to rent them out, when a tenant refuses to pay the rent, the utilities and the loan payments fall to the landlord. The obvious effect of this is that only people who can afford to lease and rent many properties out at once to spread the cost of this can become landlords.
Furthermore, if this dwelling is some part of an existing home, and you can't evict them for violating the lease agreement, then you have unwanted strangers who don't care about you, forcibly staying in your own home. You don't have to be a steenking bourgeois to own a home, and you don't need to be "advantaged" to draw the short end of this straw.
Some countries have a mix of laws for tenant relations, for example sublet agreements in some places are afforded little or none of the extreme tenant rights that direct let agreements are. That would likely have helped in this article's situation.