Well - I think it would be different if LH and others would just be honest.

If they told customers:
"Look guys, these are exceptional times and you can imagine that if you have no revenue and still need to pay expense, that's not sustainable. We therefore ask you to allow us to refund you only in 3 months - and if there is true hardship, we will do it faster. We are in it together, so thanks for supporting us."

instead of:
"so great news for you - you can now change your flights FOR FREE * - wow ! This is all what you wished for, you should be super happy. Just call us now."
* (T&C apply)

I think reactions would have been different...
Might not be possible due to corporate law / stock market regulations, but still...