Attorneys can take your case pro bono and then sue for wages later with anti-SLAPP, iirc. And it's much cheaper to file the anti-SLAPP than to defend against the suit.
But designing a justice system around "maybe you'll find a charitable person willing to help" seems like a bad idea.
Pointing out problems with the current system is not a logical fallacy, and having a working solution in-hand is not a pre-requisite to observing the existence of problems.
Also, accusing me of using the Nirvana fallacy while also accusing me of not providing an alternative policy is literally a contradiction...