Is it wrong to fake sickness to avoid duties and responsibilities?

I had to go to the army and just recently I was forced on a NCO course and I couldn't give less of a shit about putting effort into something I was forced to do and have no motivation or interest for so I just say I'm sick every morning and sit the days on the base clinic killing time.

What do you think? My example is very specific but you can do this for anything (school, work, social events etc.)
Is it wrong to fake sickness to avoid duties and responsibilities?
Is it wrong to fake sickness to avoid duties and responsibilities?
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