> This is only true if you spend too long navel gazing.
Not at all. "Now" can only have meaning withing a spaciotemporal frame of reference. We are used to operating within a single such context and our language assumes that.
Your point 2) explicitly brings up people from two different contexts discussing what "now" means.
While language that assumes a single spaciotemporal reference frame will continue to be used and to be useful, that doesn't make it useful for discussing systems with multiple frames of spaciotemporal reference.
Not at all. "Now" can only have meaning withing a spaciotemporal frame of reference. We are used to operating within a single such context and our language assumes that.
Your point 2) explicitly brings up people from two different contexts discussing what "now" means.
While language that assumes a single spaciotemporal reference frame will continue to be used and to be useful, that doesn't make it useful for discussing systems with multiple frames of spaciotemporal reference.