Then what? The same can be argued when you make a donation in fiat and even in toilet paper. No matter what currency is involved, the right way to use it is always up for debate.
You can surf the web and you will find some scandals about reputable organizations. Or stories about donations that were made through stolen credit cards. By the way, this case is not possible with Bitcoin (unless you hacked a wallet).

"bitcoin transactions are super quick and can help anyone in real-time."
Yes, that's right, but the banking system can be instant. Can bitcoin'stransactions be instant? Nope, so comparing the 'speed' is useless.
 Only the point you are missing is that those collecting donations in crypto still need the banking system to convert to fiat anyway. So the problem is the same if people/organizations have some difficulties accessing the banking system (sometimes just to open a bank accont). Or in Africa, you want to send a donation in crypto when most of the people don't have access to the internet, and even electricity