Strut Braced Wings Pinned (or Not) at Fuselage

[Fenix]

I am reading "The Glider" by Stelio Frati due to recommendations on various threads here. On page 9-18 he states "It is very important that attachment between the wing, fuselage and strut is hinged. The next paragraph (where I'm looking for the why) he states "We will not look further into this as it is not part of our exercise". So is this not important on "one piece wings" like the Pietenpol (in its original version, not the 3 piece wing which is pinned)?
I get that if it is not hinged at the fuselage then there is a bending moment in the wing spar at the fuselage, whereas if it were pinned there the hinge could not react or transmit bending so there would be none. But it seems that bending moments are ok there, such as in a cantilever wing.

So in short my questions is: Why is it important that the attachment between the wing and fuselage (in a strut braced wing) be hinged?

Thanks

 

[Vigilant1]

 

[Hot Wings]

 

[wsimpso1]

 

[BoKu]

 

[Riggerrob]

 

[wsimpso1]

 

[Fenix]