Do people actually think America doesn't show off its military might?
We do flyovers at sporting events. We have whole teams of elite pilots that tour the country performing in military jets at air shows. We have media blitzes whenever a new aircraft carrier is built. We literally show clips of bombs hitting targets on the news whenever we do take military action.
The parade is silly but it's kind of naive to think that we aren't already doing pretty much the same thing.
Even better to find out the Pentagon was paying the NFL to do stuff like this.