Why as the precision of language so important?

You have illustrated just why the precision of language IS important with your question. The Word "as" makes your question into a guessing game. What does the questioner mean? Did the questioner really mean "as" or was a typing error made of the Word "is" although that seems unlikely because the I key and the A key aren't close to each other. "Wrongly" Worded situations become the joke in some TV shows and movies. A person changes the meaning or the interpretation by the Words that are used and by the individual persons interpretation of those Words.