Corporatism was developed by the Greeks and viewed in a positive light when pondered by the likes of Plato. In such a light, the concept is often viewed positively.

Later, the concept was also used by some fascist states, especially Mussolini's Italy. In this sense, it was used in a more negative light.

As such, corporatism is not necessarily a fascist concept but I can see how you could make that connection.

There wasn't any indication from my side that I wish to maintain a coalition of powerful subgroups. However, I'd be naive to argue that any large scale society has existed without a number of subgroups who either share power within the accepted system, or take power from outside its constraints. This is because society is made up of people who have all sorts of positives and negatives but have also adapted to form groups (families, tribes, states, nations).

The thought was initially posed due to the limited time and effort that any human being has. If you want to go through the list of groups that experience the most harm and reduce that harm and move onto the next group, you need some way to choose which group to start with. Devotion to that group or perceived ability to change their fate are simple ways to select which cause (not necessarily group) to align yourself with.

In no way does that require you to align yourself with only one cause or group or exclude yourself from the same. For example: being devoted to your family doesn't make you not devoted to your country, it simply adds additional complexity to the rules and scope of your devotion to both groups.