First of all, thanks for asking about it here. We always appreciate it when people take the time to learn more about why the community made a decision (rather than, say, ranting about how we are all closed-minded fools :p).
After a quick look at your question, it looks like this is at the core of people's objections:
building an FTL drive (assuming that constructing such a device is possible)
The thing is, we don't know if such a device is possible, and if it is possible, we don't know how it would work. There are many details about FTL travel that are not known which could potentially affect the answer to your question. For that reason, we consider your question to fall under "fictional physics", which includes pretty much anything about the behavior of a system that may not necessarily have a self-consistent set of rules. That's a subcategory of non-mainstream physics, as far as our hold reasons go.
One way to improve your question would be to narrow it down to a specific physical system that is (real or) theoretically well-understood. In this meta post and comments you keep referencing the Alcubierre drive, which is one option for how an FTL drive might be implemented, so if you were to edit your question to ask about an Alcubierre drive specifically (not a generic FTL drive), that might be enough to get the hold removed. Or it might not; I'm not particularly familiar with that area of study, but people who are might say that you have to be even more specific than that, e.g. if there are several variants of Alcubierre drives, you would have to be precise about which one(s) you want to ask about.