The parent was talking about it being a "landlords market" and wanting that to be changed. I asked how that might be possible.

Improving advertisements to make them accurate, detailed, and directly-comparable is obviously a good thing. But does not change the market in favour of the tenants; the status-quo exists because of a lack of properties. That means no matter how bad the advert(s) tenants have to choose one available. If there were a surplus of properties then it would be a tenant's market.

(I'm in Europe!)

Well, no, but it prevents fraud, which seems to be the bigger problem. A honest dominant force is better than a fraudulent dominant force.