Here's an aerial photograph of the trees there were blown over by the Tunguska blast. It was taken about 30 years after the 1908 event & was used with other data by Giuseppe Longo to create a map of direction of fallen trees. You can see there is some variation in alignment. 
In a strong blast wave, there is turbulence & chaotic flow. Terrain influences the direction & intensity too. Not everything that blows down is parallel. It looks to my eye as if, even in this small area, the tree alignment varies by up to 10°.
Researchers can survey a blast zone like Tunguska to create a map of debris directing to infer wind vectors by statistically averaging local variation. Longo did that for his Tunguska map. But not everything lines up perfectly because the real world is noisy.
Here's the Bunch et al 2021 #TEHburst map for Tall El-Hammam. Every arrow has the exact same angle: 27 degrees. Does anyone seriously think this has anything to do with careful collection and analysis of data?
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