If you're that worried, it's time to go hire an engineer. A good carpenter will know as well. But one photo or even 1000 photos will not be as good as site inspection, esp since photo is biased by what YOU think is important.
However the braces are used, it works if it can transfer the load and the next load bearing point can support it. Pros often do things that are not pretty or intuitive to the novice. The valley beam looks like at least 2x12 and the roof joists looks at least a dimension less-meaning load bearing beams look like load bearing beams.
If the inspector wants to remove some insulation to confirm, ok. Easily replaced with can foam.
Novice's intuition can be right too. If this is a house on the market, and you're that worried, strongly recommend walking away.