Equally as a coach - it's not enjoyable working with capable kids who only put effort in when they think it matters. We defiantly get these kids that look good at try -outs/comps but do not train well and don't really enjoy day to day training that will be most of their gymnastics time.
Ideally we want the kids who do their best regardless, not just because their parent said today was the day to actually try.
That is not to say these kids don't deserve a spot they are usually very talented, but they can be frustrating to work with. Coaches need a different tact sometimes when working with them to get long term success when their ability to pull the tricks out of the bag when they need them no longer works