Most people at least in my experience, are used to the fit and forget groupsets up to about 10speed I guess. No fiddling about, take the bike in for a service now and then. Clean and lube occasionally ...
Modern 11/12sp although having many cool benefits has become really 'needy' ... IMHO of course. Special inner cable for this and outer for that, service this every 5 hours, replace that every 50
Heaven forbid you haven't complied exactly to the letter should you have a problem