Of course there's competitive pressure to reduce or get rid of these fees. Plenty of people avoid buildings with brokers fee. Its even a filter in most real estate sites. I personally only looked at no fee brokers in the apartments or amortized the broker into the monthly payments. And for me, only no-fee apartments got my rent.
People aren't dumb and look at an apartment and get quoted $4k a month and when they go sign they realize its an extra $6k broker fee and just open up their wallets like "whoops". It's definitely factored into the price and affects who gets in to the door