I don't think anyone is saying that you should not try to get things right - that's all part of the fun trying to get as close as you can.

One time we had about a week to make four costumes for a Renaissance fair. We looked up period costumes in the libraray, made our own patterns and bought material that looked as close as we could get within our budget. My Oud had just broken and there was no way that I could find another instrument in the time. So I faked it with a paper doily stuck over the soundhole of my Yamaha guitar. There were a couple of people there who did know what they were doing. Fortunately they were quite amused by it and were quite positive in their comments.

It's fun - no one can ever get it completely correct - so don't be so uptight about these things.