When I use the word argument I don't use it in the pejoritive sense. I merely mean to say that it appears that you are saying (in this case):
Dr writes:
But someone was smart enough to program the heart not to do this.
to the effect that "I can't understand why this should be this way; therefor something/someone does something to make it work".
This does not follow. I'm inferring (perhaps incorrectly) from this that you are implying a designer, here. But this does not logically follow.
The points you raise are interesting but do they point to a designer but to simply a gap in our knowledge.
As any scientist doing active research will tell you a gap in our knowledge (or research for all you MSc/PhD candidates out there) is great as it gives us something to sink our teeth into and get working on.
The other option is to say 'goddidit' and not apply for any more funding.