I'm sorry to be the tame Grinch, but my (very blunt and biased, because, full disclosure, I dislike both Amazon and Boeing) lines of thinking are as follows:
Line 1:
Jeff Bezos wants to launch drone delivery
Bezos's contractor crashed a plane
Bezos doesn't want negative publicity
NTSB's budget for 2018 was "over $100 million"
Bezos's personal income for 2018 was $32 billion
Boeing bought FAA
Bezos is haggling over the price of NTSB
Line 2:
Boeing has proven that it likes to cut corners
EgyptAir 990