It also means that it once was great but it also completely abdicates any responsibility for defining when that great period was in our timeline?
Was it great in the 50s when institutional racism was the law and a black girl going to college was justification for rolling out the national guard?
Was it great in the 70s when we were fighting in Vietnam for literally no reason?
Like what time period are they talking about?
Maybe they mean in the late 40s when we were rolling off the high of winning world war II? And the great majority of men had died to the point where wage inflation made even moderately capable men comparatively wealthy to today's standard?
Is make America great again really just a code to try to start and win world war III so that 20% of all males in America would die and therefore the surviving 80% would have more luxuries given to them by default?