Pine trees specifically are low quality wood. Key issues with natural wood generally are warping due to humidity and misaligned fibres, strength, rot.
The low quality stuff is full of knots, warped (with very high variable humidity- some beams weigh 2x other beams). The high quality stuff is.... not as nice as maple, but certainly it's dense, uniform, and doesn't warp. From what I can tell, it's because they select the high quality stuff, then kiln-dry it and mill it.
Also if you inspect cheap 2x4s, there are often some higher quality pieces (few knots, straight-ish, not too wet) which you can then trim and plane to get decent wood.
But yeah, pine is sort of an industrial product grown fast at scale.
Pine is well suited to its use, otherwise, well, we wouldn't use it!
It's by a massive margin, the most common lumber used in construction. Its strength and other properties are well understood and all you have to do is follow the specifications and it performs great.
I mean what would even be the advantage to using other woods for home construction? Using a "stronger" wood means what? You can make your structural members smaller than 2x4? What would be the point? Walls need space for insulation and wires and pipes, there's no good reason to use a more dense wood. And it would still be more expensive! Pine is perfect for what it does because it meets the practical and engineering needs at the least expensive price.
What isn't well suited for it's use?
https://www.finewoodworking.com/2022/06/16/for-the-love-of-p...
I've been woodworking for decades and would never use it for furniture. It moves way too much with the seasons (fine for barns where you can build large expansion joints, but not for my chair), and it doesn't take stain well unless you take additional steps to prepare it beforehand.
Also many/most barns used whatever wood they had available. In my area the insides are mostly cottonwood and the outside is oak.
That's not an argument to use pine. It's an argument to use whatever you have at hand.
This statement works just as well if you replace "pine" with "leaded gasoline".
It's exactly my point that not every material is good for its use. Even ones used in the overwhelming majority of cases -- like leaded gasoline. The ensuing environmental disaster shows it was exactly the wrong choice of material to solve the problem.
Even if people use that argument quite a bit.