Which brings us to group two - the people who combine existing lego bricks into new forms & shapes. Sometimes they need to invent their own glue - but the heavy lifting is done by stacking lego bricks in new and innovative ways.
Lastly you have people who customize - they arrange furniture in a barbie doll house to create an innovative arrangement which delivers value. These people tend to use mostly complete solutions, put a little veneer on or make some minor changes and deliver value through content and other areas.
Now - all three models are valid and valuable. But mostly only the first one might require strong IP protection (note that this is all very broadly speaking and thus a vast generalization) – as only in the first case the founder actually created something new and unique which truly didn’t exist before. In the other cases I would argue the “protection” for the startup is much more execution based. If you execute well, you’re golden. If you don’t, your IP isn’t strong enough to make it properly defensible.
Again - this is a sweeping generalization. But I find it helpful to think in these categories and seriously consider using open licenses for your IP to reap the benefits of innovating in the open and with a community.