Something being the law doesn't negate its qualities. The law is enforced through the threat of violence. Ignoring this fact is euphemizing what your political ideology is actually endorsing. The fact that laws are enforced through the threat of violence is extremely important, because it tells us why a humane society does not use the law to punish consensual activity or noncompliance with morally illegitimate demands (e.g. the demand by income tax law on the population to surrender its private property and privacy rights).