"Financialization" is a 7 syllable word with no definition.
There is nothing about how Boeing builds & sells planes today that is qualitatively different than how they did it 50 years ago. Yes I am familiar with the concern that engineers hold less sway than previously and I agree this is a concern. I would not be shocked to discover that it's true. But this is not a new thing.
People who sell a thing, be they multinational airline manufactures, or a kid selling lemonade, have been able to profit by lying or skimping on quality since the dawn of time.
If your concern is that Boeing will skimp on quality & safety, then say that, instead of a buzz word like "financialization"
I have no idea where you came across the word, but when I see it used, there's generally a lot of handwaving and some vague implication that it's some new concept/activity that started in the 1970's. The only consistencies I've observed in attempts to define it is that money = financialization or "number go up" = financialization, and the speaker is generally uncomfortable with money as one of the tools we use to organize society.