Gareth.. as a new member please try to word your posts so that they do come across as if you are attacking this said course provider..
Yes, peeps will only learn so much from a course and i think they can learn the basics of what tiling is and the rest comes with time and practice , you can't say everyone who does a course is crap... so of our top tilers on here have made a good business and turn out awesome work have started from a short course..
IMO a course aimed at diy etc is just that and if someone wants to learn a trade from one then they progress further after the course by trying to work for someone, but that is also not always available to them, so they do bathroom for friends and family and try to learn from that.. but only time and patience and neatness will help them..
Just my take on it anyway..