Robinson was/is obsessed with ‘risk for reward’ players, whether that be players such as Browne, Baldock, Wildshut, Anderson, Jones or Murphy.
Partly because it fed his ego and self delusions that he could get players back to their peak and that he (KR) was some sort of mental/physical health guru.
They tend to easier signings to get over the line too, thus avoids the hassle of working hard at recruiting and attention to detail that is needed. Other more pragmatic managers see too many negatives attached to such players.
Carrying too many of these type of players makes it difficult to be successful, there will not be enough consistency over a season, yes there may be purple patches but also poor run of results.
You can be sure Plymouth didn’t fill their squad with ‘risk for reward’ players last season, a lot more planning, preparation and hard work went into it than it did at Oxford.