I myself am still thinking about all of this as well!

Perhaps there is an inverse relationship between one’s spontaneity and one’s level of knowledge (which is most easily acquired through reading). But perhaps spontaneity does not guarantee creativity and perhaps all creativity is not good creativity.

I believe that even if one’s frequency of spontaneity is reduced at the cost of increased breadth of knowledge, that the decrease is worth it (per my preference) since I think the knowledge has the likely chance of enriching your pool to draw from for creativity!