We don’t have to imagine force fields or any other MCU-tech, what if you had a way to disable all those weapons before they could even be launched at you? Or even in flight?
EMP exist now, and humans can shoot missiles out of the air - it’s perfectly imaginable that Aliens could think about our explosion delivery systems as being slow and vulnerable as fuck.
There was lots of stories about aliens doing exactly this when I was interested in the topic a decade ago or something. I don't know how much of that is possible to find on today's web since it's all censored and removed now.
Alien tech is much more advanced than what we have here. But I think it's clear that they are not like humans in the way that they build weapons and measure their status that way. They won't use technology against us unless they absolutely have to, in self defense.
The upside to that is that humans could and probably would just sneak nukes onboard their ships and set them off on the inside if they did try to invade, a tactic for which they'd have no real defense.
Any civilization that had those things, even rudimentary Trinity Test ones, are on a whole different playing field than any that came before by virtue of the nature of nukes, so it is reasonable that aliens would investigate nuclear powers first.
The even harder problem that doesn't appear to have any physics to support it is carrying around whatever structure you're proposing and making sure that it doesn't destroy the ship or itself while you do so.