I would think the reason is that in those cases, when they "voluntarily declare it was OK" that wasn't actually a conscious decision, i.e. they said yes to one thing without realising that that by definition also implied saying yes to something they'd rather not say yes to. So they are a victim of their own mistakes.
Compare it with me not realising I'm logged in to the production database, and accidentally wiping it. Sure, you could say "that's what you get for logging in to the production database", but you could also say that maybe the organisation setup shouldn't have led me to logging in there.
Yes, sure, but that's not a useful analogy when it comes to what people picked for their licence. There's no equivalent "company you were working for" to blame a process failure on, and picking the wrong licence isn't even a process failure. It's either an individual failure at the time, or it's someone who changed their mind.
I'm not arguing whether or not it's nice to do this, but I think it's important to be clear that what you set out in your licence is important, and your fault if it's wrong.
Compare it with me not realising I'm logged in to the production database, and accidentally wiping it. Sure, you could say "that's what you get for logging in to the production database", but you could also say that maybe the organisation setup shouldn't have led me to logging in there.