... it makes no sense to intervene unless you actually have the skills to back up your words....

...Good intentions without skills just add to the victim count. I suppose you could say that he saved her... but he died doing it and I don't see needless sacrifice as much of an improvement....

Willingness and commitment to do what is necessary and knowing you have the skills to do whatever becomes necessary without hesitation... if you don't have these, it's better not to intervene...

That said, in my own mind there are certain situations in which you simply do not consider your own welfare.