[xkcd1963]

If the mole or skin tag is detrimental to your health, or if you nose's pathway is giving you trouble breathing, then yes, I'm in favour of an operation.

If it is just for cosmetics you are not doing yourself a service. Most of the time people do it because they have a low self esteem.

[joshuakcockrell]

What’s wrong with making cosmetic changes solely to improve low self esteem?

[xkcd1963]

Let me use a metaphor. You don't fix a leaking boat by pouring out water while sailing. You rather bring it ashore and repair the holes.