The reality is these firms are scared after what happened to Perkins Coie (https://www.whitehouse.gov/presidential-actions/2025/03/addressing-risks-from-perkins-coie-llp/).
They were effectively banned from court houses and federal facilities. What use is a law firm that cannot appear in court? Even if they fight it, the revenue lost until something like this is overturned could destroy the firm.
Partners at big law firms have chosen to protect their businesses as is their responsibility. Associates would be also correct to quit.
Some big law firms have made clear that if associates do not want to be involved on a Trump related matter they will be removed from it and will not be forced to. These partners know this is not good for their firms and will cripple future recruitment, but it's this or be out of business due to retaliation.
Until citizens can pressure those in government to uphold the rule of law and create/enforce consequences for unlawful actions, this sort of thing will unfortunately continue.