You must have never encountered the system. Comments like this really show the naivety.
Weed laws have relaxed in (some) states but the same crooks that would have gladly ruined someone's life over an joint not 10 years ago are still working there, are still the same people, and are still running the system. Even in the most liberal states, if they don't like you they will use parallel construction to get in your house. Have a few too many ounces? That makes you a trafficker. Have kids in the house? Child Endangerment. Are those illegal car modifications on that turbocharged Honda the garage? Looks like you're running an illegal auto shop and circumventing federal emission laws. Looks like bad news for you.
Are you outraged? Don't like it? Well then too bad, courts have a 70-80% conviction rate. Word of advice: Never, ever, underestimate how unfair and dangerous the system can be. Law enforcement is a business, you are the product, and the government is the customer. You can have your constitutional rights stripped in an instant, and that's a best case. All we can do is avoid it, and make an effort to vote out people and insane policies that continue to trample on our rights.