Sepsis is not a joke and cleanliness can be important.

However, I have a problem with lotions and potions in first aid.
The people who trained me told me to put nothing on a wound.
Not even iodine or weak peroxide.
If all I am trying to do is keep them breathing until they can get to a doctor's care then I am not going to worry much about infection or even about cleaning the wound.
Most of the time attempts to clean wounds in the field cause more harm than good.

Wound closure is the doctor's job, so I am really just going to use bandages that I can tie on and pressure pads to stop the bleeding if I have to. Sticky stuff just has to be removed when the doctor gets to it anyway and often means more damage when it is pulled off.
Wounds with big pieces of junk (glass, wood, metal) in them just get padded and immobilized until a doctor can deal with removing whatever it is that is stuck in the wound.
There is too much risk of me causing even more damage by trying to remove it at the scene.

If the wound is a minor boo-boo cut and I am closing it with a bandaid then a bit of soap and water goes a long way.
Try to keep soap out of cuts but irrigate with clean water to remove anything foreign like dirt or glass. (saline is nice but not required)
Pieces of junk in the wound cause more trouble than you might expect because the body must work on rejecting them, plus they provide a site for bacteria to grow on inside the wound.

Again, infections are for the doctors to treat with proper drugs and are not (in my opinion) my problem as a first aider.

If we are talking about long term bush medicine that becomes a different game entirely and I am not qualified.