It does not say they "kept" relics. Please read again without inserting words or additional meanings. I will help make this easy to do:"God was performing extraordinary miracles by the hands of Paul, so that handkerchiefs or aprons were even carried from his body to the sick, and the diseases left them and the evil spirits went out."
... Please note that these were not "relics" of the Apostle Paul.
... These were "handkerchiefs or aprons" that had touched his body.
... Nowhere does it say they belonged to Paul."That is sufficient justification for the authentic Christians to do the same."
Sure, if that is your template of truth, then you will only take (not keep) "handkerchiefs and aprons" that touched the Apostle Paul to carry to and heal people immediately.No bones. No shrouds. No idols. No breast milk. No hair. No costumes. No anything else.
... You will simply take these "handkerchiefs or aprons", formerly touching the Apostle Paul and carry them to a sick person, lay them upon the sick person and see immediate healing.But that isn't the meaning of your post. Your post excuses the worst idolatry because it found one verse that could be used as a springboard to justify anything.... After that, you will not pray to them, adore them, fondle them, caress them, etc.
Like many of your posts, you have inserted both words and meanings that are not in the text. It is wrong to add to the Word of God to support the traditions of man or for any other reason.
To take a relic and heal the sick with it is already “keeping”; plus I don’t imagine after that the miraculous cloth was discarded as an empty pill bottle. What would they do if someone else gets sick?