Well, why would non-kosher food be on utensils anyway?
But those may actually cause
more problems, as there are differences
between how hot/cold food and utensils are managed if you accidently
treif them out.
These are not "loopholes", the rabbis are trying to make life smoother for observant Jews, while at the same time following halachah. I don't get why
so many people say rabbinical laws are a burden to people, and then when the same rabbis try to make accomodations in regards to observance, people accuse them of making loopholes.
By observing rabbinical law as well as Biblical law, it elevates
everything
that we do to a higher spiritual level. It brings us to a closer connection
to G-d. When you cut an onion, is it a spiritual event? It is for me.
Well, that's a pretty dismal way to look at things