I don’t disagree but it’s not hard to understand why people think “military grade” means it’s better. “Military grade” communicates tough/durable/stress tested to a lot of people. Veteran/patriot isn’t an indicator of build quality, even if it is also pandering to a certain sensibility.

For many products it just means it's a small run from a group that may not have a lot of domain experience using materials and methods that will make the end product appear superior to buyers.