This is evidence of a flawed thought process. This is the "well if it saves JUST ONE life!" we can justify anything.
Let's put it another way.
Let's say America chose to allow 1,000,000 high-value foreigners to immigrate. We're talking PhD STEM grads. Proven entrepreneurs. Independently wealthy individuals.
The catch is that one of them (we don't know which one obv) happens to be a violent criminal who has hidden it from everyone and will murder one American citizen.
Does that one death make it bad pollcy? If you say no, and you say it's good policy, then "you would prefer that crime increase".
It is not a flawed thought process because that isn't the rationale that I am employing.
IF we were taking solely the "high-value foreigners to immigrate. We're talking PhD STEM grads. Proven entrepreneurs. Indepently wealthy individuals."
If our actual policy looked anything even remotely like that, then I'd be fine accepting the logic that getting one bad apple along with 999,999 tax-paying, innovating, contributing citizens is obviously a good deal.
That would be a good deal even simply on a "net lives" basis because one of those 999,999 STEM grads would surely invent something that saved at least one life.
The biggest problem with our system is that generations of Presidents (from both parties) have steadfastly refused to uphold their oaths by actually securing the Southern Border.
I said MUCH earlier in this thread that the border should be secured EVEN IF we choose to allow more-or-less unlimited immigration because even if we aren't going to put any limits on quantity, we should still be identifying and screening those who are entering.
Your argument about trade-offs can't even be addressed currently because we have absolutely NO IDEA who or how many are arriving.
If that problem were resolved, THEN we could move on to discussing trade-offs and numbers.