The plywood comes from the store flat/planar. If it's bent downward there must be a force doing this.
I also remember PV=nRT, so
for a fixed attic volume V
as T (attic temperature) goes up due to sunlight hitting your roof,
the air pressure (P) in your attic will increase.
Ideally this hot air will be forced out your roof vents but with no vents the high pressure air could be forced downward through the plywood holes into your conditioned space.
So just cut one hole to start.
Using the same formula with politicians who occupy a fixed volume and have constant body temperature, something else must be forcing the hot air out of them.
If I had to guess I'd say they are full of decomposing ca-ca, which gives off heat and noxious substances.