think some people do not truly understand the truth and meaning
- Two words which I'd personally never use in the same sentence...
Etiquette and tradition are separable and I think you'll find that even the most diligent "traditional" dojos outside of Japan will have a slightly different take on what is traditional practice as it will have been modified by the perceptions from their own culture.
What I saw as the thrust of the original question is, can you practice aikido without the traditional trappings of a Japanese dojo. My answer is yes. However, I did not say that that would necessitate zero etiquette in the dojo, discipline and good manners span all cultures and most ma.