A lot of skills in say, running a business, really do transfer. It is possible to gain expertise on how to run a small business and translate that to other realms of running a business. But it is also important, perhaps critical, to recognize limitations. The less similar the situation and environment the less that will transfer. Some times enough transfers that the insights are useful. Some times it is actively harmful to apply previous approaches. Recognizing the differences and what transfers is much harder but also a skill. Becoming skilled enough to help up until your limitations is how you can continuously be successful in domains you have no right to be. The irony is even then you may still not really be able to offer helpful insight.