Yes, if one takes landmines and shoot on sight orders seriously, then, yes, an immigration moratorium is just fluff. So, let's just do it. (Uh, meaning moratoriums – not land mines.)
There are very few, if any, complex problems where sledgehammer solutions are a good idea. A moratorium on all immigration, stopping the best and brightest from coming here in order to stop the wretched refuse of the near-by teeming shores, is not in the best interest of the nation. We need to think instead of emoting. Most people stopped thinking on this issue long ago and are now just running on emotions.
Memes and slogans do not make for good policy, but unfortunately that's what's been pushing this issue for many years.
Even history is being rewritten in order to sustain long-held positions on the issue.
"Control" does not mean "stop". My faucet can either be on or off, but I control the flow between the two options with a simple movement of the handle.
We need to control immigration better. That means the borders, that means the legal entries, that means the visitor and student visas, and that means finding a way for labor to enter the country legally, work here, then go home with the reasonable expectation that they will be allowed back in when there's work available again.