Maybe because I am British and thus possibly considered old fashioned but parade is important.
When on parade do you look your best? Yes of course, this gives pride in yourself, your colleagues and most importantly your unit.
Does parade help with discipline? Yes you have to obey commands and act as a cohesive unit, to learn your own job and to rely that your pals are all doing their own.
No doubt the modern countries will now answer in droves stating it has no modern use..but consider this, what class does your average grunt come from? Discipline and following order has to start some where.
I personally enjoyed being on parade, I felt proud and my family were very proud of me...my gradfather was close to tears as it reminded him of his own service days.
What a better way to show the public what the new recruit can now do.
Parade is Good...so there!