Neither. Making it a good OR evil issue is thinking based on the carnal mind's corruption of illegally consuming the fruit of the tree of the knowledge of good and evil.
In Scripture, the only prohibition given to Israel through the Law of Moses was concerning marking the body for the dead, a form of idolatry of that time. In principle it would go for any tattoos or piercings marking the body for any idolatry. The issue was idolatry, not the actual physical body whether pierced or tattoos or not.
There is no direct statement by the law concerning piercings in a negative way (as if they are wrong). Decorative piercing was completely acceptable to culture and God never gave rule against it. The only rule in Scripture about piercing is a positive one about those who want to be life-long servants of their master allowing the master to pierce them as a sign of their commitment.
The natural body we currently live in will perish, along with any piercings or markings. Therefore, such has no meaning in a spiritual and eternal sense. This is good news for those missing limbs or having other bodily problems they will not have after the resurrection. It could be bad news to religiously minded who enjoy legalisms and restricting self and others with added rules and opinions of what is right and wrong.
The law is good if used lawfully. Most people today who advertise themselves as knowing, understanding, and keeping the law don't really. They understand it incorrectly like the Pharisees and Sadducees of Jesus' generation, and use it unlawfully. They do not acknowledge the true purpose of the law or how it should be used, because their minds are darkened by the wrong fruit from the wrong tree and they are still living as though separated from God, despite the reconciliation Christ worked for us. Ignore such religious minded non-spiritual opinions.
Only the mind renewed in Christ at perfect liberty free from contamination of that deadly religious fruit of the knowledge of good and evil sees things, including the law, correctly, from God's perspective rather than carnal man's.