Darlin', some of what you're saying is factually inaccurate (i.e. there has never been a generally accepted assumption by scientists that UFO=ET craft) and some of it is downright nonsensical (i.e. comparing science to law and history is like saying 2 + 2 = potato).
I think you'd benefit from a better grasp (and appreciation) of the fundamentals of critical thinking, scientific method, and other generally accepted scientific principals and practices.
Right now, you’re trying to play poker with an Uno deck.
That being said, we're all ignorant. We're just ignorant about different things. There is no shame in ignorance. There is only shame in willful ignorance.
I recommend reading Pseudoscience and the Paranormal by Terence Hines. It's an easy read, covers the basics clearly and concisely, and includes a lot of debunking examples so you can see the practical application of each principal covered.
As an example of how the basics will help you in discussions like this . . .
rather than jumping the gun and insisting on the ETH as an answer to a question that science isn’t currently asking.
There is a generally accepted scientific principal known as Occam's Razor, which, (oversimplified) means that given competing hypothesizes, researchers should go with the one founded on the fewest assumptions.
Relevant to your example, this means scientists would first look at terrestrial possibilities before even considering "ET crafts". It’s UFO enthusiasts (those who are already sold on ET crafts) who refuse to look for any other explanation.
To put this in perspective, Hines’ book was assigned reading in a critical thinking class (should be a first-year requirement for all students) that I took as an undergrad 25 years ago. Way back then, we read the research debunking UFO enthusiasts’ endless claims that “science isn’t currently asking these questions”.
“Science is ignoring my question” is a mantra of pseudoscience enthusiasts. More often than not, science did ask the questions; the people asking just didn’t like the answers.
Even more two decades ago, (before some of y’all were born) scientists were attributing UFOs to weather balloons, swamp gases (whatever the hell that is), experimental top secret military aircraft (both foreign and domesticate), etc.
There may be yet unexplained (unexplained and unexplainable being two very different things) UFOs out there, terrestrial or otherwise, but we'll never know because the same old claims are gumming up the works, wasting time and resources, as we address them again and again. And again.
You seem like a bright person eager to learn. Please do yourself a favor and read the book or any good book on critical thinking and scientific method.