I mean- I am likely never going to understand the science that goes into fixing a tumor- I just haven't trained to be a doctor, nor plan to go that route at any time in my life. However, you can surely bet that I trust a doctor to take one out of me (without understanding it) if I have one - and this is the right thing for me to do.

And of course, the fact that occasionally some implementations of SSL have been found insecure is in no way an argument to not use it (at least until something more secure is available).