They were - of their own time - to put Folk on the TV in the 60's they were probably required by producers etc. to project themselves in a diffrent way than they would on an ordinary stage . Selling the idea of Folk on TV must have been difficult when you had the likes of Jinmmy Shand / Andy Stewart etc.
Let 'em be , as much as I have come to dislike the song ,they carved their name in Scottish culture with Flower of Scotland - watch the next big Scottish sporting occasion - they'll all be singing it. My dislike is mostly driven by having heard it sang halfway through by inebriated Scots who either didn't know or had forgotten all the words.
There is certainly no criticism of the Writer/Performers of the song .
They have made an invaluable contribution to Scottish and to British music and don't deserve a hard time.
Release of their records - doubled the repetoire of many a floor singer.
I write as a true blooded Englishman who takes and took the Corries seriously and takes his hat off to them.