Do you agree that the exact EMA or SMA settings are not very important?

The settings are important, but not because one exact configuration is universally correct. What matters is how you arrived at the setting and how you feel about it. If you use a 10 SMA and have tested it against a 9 SMA or 10 EMA, then reached the conclusion that the 10 SMA works best for you, that study is important. You should not use a moving average simply because another trader uses it.