Wrong and entirely incorrect.
RL medicine can roughly be divided into four groups:
[ol][li]Don’t need help, will pass on its own (common cold’s there), but optionally can easen symptoms.[/li]
[li]Can do it on its own, but much better if helped - average burns, cracked bones, etc are here.[/li]
[li]Can’t do it on its own, need medical help. Internal bleeding, tumors, broken bones.[/li]
[li]Can’t do at all, whether alone or with medicine. This category is slowly decreasing, but the only solutions for it are painkillers and mercy kill.[/li][/ol]
Do note that I count ‘put things in place and leave body to heal the injuries’ as ‘medical help’. Medicine can either help with healing, make healing possible in the first place, or forcibly fix issues (like, say, appendicitis) - but the actual healing is done by body alone. There are no magical gels that regrow your skin or replenish your blood. The most medicine can do, here, is devise something that makes body able to do it, like that structural gel providing necessary framework (literally!) for skin regeneration.