I'll take yet another stab at the thought with an observation that these are all symbolic language expressions rather than linear language expressions.
To be honest, I'm not exactly clear on your terminology. All language expressions are inherently symbolic, and I'm not sure what you mean by "linear". Perhaps you are saying in this case that such words don't have one universal meaning in all contexts, but rather have multiple shades of meaning heavily influenced by context?
If so, I'd certainly agree. My main feeling vis a vis "onegai-shimasu" and aikido is one of stressing the everyday naturalness of the phrase, so it doesn't overly imbued with solemn and reverent meaning.