Sadly having Facebook / Meta / Twitter on their CV makes them more employable, despite the lack of morals and ethics of their previous employer(s)
They don't see big tech as unethical
One tactic for us, is to say we are committed to safeguarding, privacy, data protection and ethical / moral behaviour, therefore you won't find me on Facebook or using Microsoft products
see if that gets them thinking
@zleap I've been making those statements (and walking that talk) for the past 20+ years :) - I also point people at this, where I explain why proprietary software is inherently undesirable for ethical people: https://davelane.nz/proprietary