People lower than that won't be in positions to do anything.
I'm of course not limiting my scope to what I hear in my own country. I've never heard anyone talk seriously about military marches in terms of someone being a threat. A march just displays some of the personnel and material a country has, and everyone already has far more detailed information than that so it just doesn't say anything. If someone judges a country's military capacity by saying "look, they can muster together a parade" then that person is completely clueless.
People worry about Russia and North Korea because they know what they possess and because they have a provokative attitude and history. No one gets afraid of either country having a march, but Russia pushing boundaries, making official statements and training for obvious real targets makes waves in a lot of places. Just like NK makes waves with their statements and nuclear weapon testing, but no one cares that their military marches around for show somewhere within their borders.
Nobody would be worried about Russia or North Korea, if they didn't have a population which can be mobilized for a military campaign.
That's what the military march is all about. It is no surprise that the countries most capable of utilizing aggression against others, have gone down in history for displaying a legendary amount of military jingoism, with all of the symbolism, war deification, parading involved with that. Look no further than the Nazis, and the mere fact that people are still using them to point out to the dangers of any over displays of nationalism. Any time someone creates a symbol around their movement, starts marching in unison, singing military songs deifying war heroism, and waving flags, the Nazi card is quickly brought to the table. For a reason, to an extent.
Clearly, military parades are seen as a threat by many of the intellectuals, atleast, which is why they must constantly shun and discredit them, often by insulting the intelligence of the people involved.
The truth is that the military march has a much deeper meaning to the nation than what is being given credit here, but since it serves the agenda of many of the people here, to not give it that credit, having any kind of a legitimate debate over it is pointless. It's just inevitably going to devolve into a game of calling military parades "dumb", hurr durr, so that the plebs can feel like they've done their good job for the day, by sustaining some social pressure against the evil dudes in uniforms, in their social media feedback loops. That's their given task in the context of the modern society. It's just that I personally have no care to take part in that.
In reality, all of that, the boasts, the threats, the provocations, are all tied into one package of militarism, that has been found effective
for centuries, in which no part can truly be separated from the other.
A country incapable of bringing the population together to celeberate a military march, is a country that is likely incapable of taking any military action. It would be foolish to downplay the implications. Back when America was more capable of utilizing indiscriminate military power against others, and standing united behind their leadership, bringing the people together for a march wouldn't have even been a question. I'm not saying that this was automatically good, or bad, I'm just saying that that's what it was.