Ok i see what you are saying but if you use a top quality paint 2 coats or more oak and maple will last for years.Also before we put them in the kiln the ends are coated with end check paint.https://www.leevalley.com/en-ca/sho...finishes/20099-lee-valley-end-sealer-for-logsWhite pine is lightweight but still strong,dries evenly,easily worked ,inexpensive and readily available in most of the US.If not in contact with the ground,it is decay resistant.
Both the red and white oak groups are open grain woods and absorb moisture readily.Note that they are never used for siding or outdoor construction.Oak is heavy and hard to work and is prone to splitting.When drying ,oak tends to cup and warp unless quartersawn.(this is why most oak flooring is narrow)Clear oak is also expensive.We would ship oak from CT to Quebec while pine was sawn locally for barn siding and construction grade lumber.
While maple is closed grain, it has many of the same characteristics as oak and again is mainly an "indoor"wood.
I know what you mean we got some black locust and built a hive out of it.Boy it was tough on our planer ruined a set of blades.We will never do that again.Red oak is not very weather resistant but white oak has a closed grain. That is why some outdoor furniture used to be built with it. But hey! If we get wood cheap or free we will use most anything . I made a 8 frame medium with hickory. It was free wood. Rough on my planer (even the part of the board without the knots) and very heavy!