Hi @denmarkguy. Very good post where you make clear some important aspects that motivate a person to collect stamps and the value they provide since their emergence.
Through them, we can see the different stages of the technological development of the human race, its advances both on land and in the aquatic and aerospace environment.
It is also a great miniature source to learn about the biodiversity of both flora and fauna.
In short, despite all of the above, there will always be the pleasure of having these collections of stamps at home, being able to see them, touch them, and recreate the sweet pleasure that they awaken in our emotions. That's how I feel with every object I collect.
Greetings from Cuba