From a buying/selling perspective advisories can be useful. If buying, and the same advisories come up in consecutive years, this indicates the seller basically does little to no maintenance. If the seller has receipts that show he/she bought replacement parts shortly after getting an advisory, this indicates that the car is looked after fairly well.
Of course a good diy mechanic can foresee potential advisories /points of failure and remedy them, as can having a pre mot, but a used car with a list of straight mot passes would ring an alarm bell, unless of course backed up with lots of service history.