So, to me, this is two of us looking at the same problem and seeing different causes/solutions. Even more so, it's like a balloon; when you squeeze one point, it causes problems in another.
Sure, illegal immigration allows for cheaper labor and, potentially, the situation could be changed if you stopped illegal labor (although, honestly, I don't think that's truly possible, but for the sake of argument...), so you see the illegals as the issue. I see this as a more inherent flaw of free market/unfettered capitalism.
Those high school kids/local folks value their work at a higher rate than the market is paying, so they won't take the jobs for what they're willing to pay. More so, you have BUSINESS OWNERS that are choosing to hire that lower labor (because it means higher profits to them because they don't pay taxes/benefits/vacation/etc.), as well as END CONSUMERS that are voting with their wallets to only pay for that lower labor because it costs less, so it's the free market working as it's "intended." If the high schooler's/craftsman's skills were that badly needed, they'd be the go-to. The illegals that come here and work off the books, longer hours for lower wages without any labor protections, are willing to work "harder" than the high school kids and locals, and are being rewarded for it by consumer dollars paying them over higher priced options.
The situation could be fixed by cutting immigration, or it could be fixed by requiring business owners stricter adherence to labor laws, paying higher wages, and by the end consumers voting with their wallets to pay for "All American" legal labor.
Again, like above, we see the same problem but have different opinions on how to fix it. I think this is a more a problem with our healthcare system than with a sick or injured person being at fault because they need medical care. ERs MUST, by law, see every patient that comes in. If an illegal doesn't have an SSN, then they can't be traced to pay the bill. But, if universal healthcare was a thing, then chances are a lot of those ER visits would be doctor's office visits and not be such a costly burden on the system. Obviously, there are more pieces to this argument, but I'll keep it short for brevity's sake.
Same for my ancestors. While I'm certain instances like the pregnant lady coming over just to have the anchor baby do happen and there are folks working the system, I think a lot of it is also the "boogeyman" narrative that is played hard by anti-immigration folks. A lion's share of the immigrants are exactly what you (and most of us) hope to have: Law abiding people that want to come here to work hard, be an integral part of society, and be a part of the American Dream to give their kids a better life than they've had. Are there some that ruin that picture? Hell yeah. But, that's human nature and any group of people (immigrants, men, women, right, left, up, down, and even the damn Air Force) are no different. Do we all know pilots/coworkers/leaders/men/women/whatever that shouldn't be flying/are terrible leaders/are terrible people/etc. and give the rest of us a bad name? I've been in the AF for a cup of coffee in time, but I can say I see that. Just as I see it in the FD. It's life.
I just hate to shut the door to everyone because there are some people that are going to take advantage. We don't get to choose who we pop out of and where, so not everyone is fortunate enough to be born in the status of life/country/situation that they wish to live in. A vast majority of immigrants I've run into in my life, legal or not, just want to have a better life for their children and will do what they can to make that happen. As a parent, I can't blame them.
Agreed. We might not fully agree in the details or the exact way to go about it, but at least we're discussing it like civil adults. We need some more of that in this country right now.