"Jimmy Shand, Andy Stewart, The White Heather Club, and fecking bagpipes put me off Scottish folk music for life".
A bit like me saying ""The Spinners" put me off English folk music for life" - which they didn't.
The examples mentioned are from the 1950s - 1960s. Things have changed quite a bit since then.
And none of your examples would ever have set foot inside a Scottish folk club, which we've had for more than 60 years.
Anyway, entirely up to you - it's your loss.
One thing which I don't think has been mentioned in this discussion above is that several of the larger cities of England which have significant Irish populations established branches of Comhaltas Ceoltoiri Eireann, who taught the playing of Irish music, and were also always keen to go out and play it in pubs. The nearest we have in Scotland would be the TMSA, which has only a tiny fraction of the worldwide membership of Comhaltas, and to the best of my knowledge, has never had any branches south of the border, nor anywhere else outwith Scotland.