"Laws that are not enforced are useless" - Worse than useless because it's a license for the justice system to discriminate. "We don't normally enforce this law, but we're enforcing it against YOU right now."
Also worse than useless because those who normally follow the law begin to build immense frustration and loss of desire to make their own good choices.
It is called "prosecutorial discretion" used by prosecutors to favor the powerful, wealthy, connected folks. Right now, this discretion is extended to favor ordinary folks belonging to right categories.