The question Does "wage war" mean "declare war"? was rejected by users on EL&U while my second question, Can “wage war” be synonymous with “declare war”? has been well received and has attracted a lot of attention on ELL.
I understand that ELL is a site for more basic questions compared to EL&U, but I don't understand why it was rejected because of lack of research.
I checked dictionaries and gave the definitions I found, but after that I still didn't understand if "wage war against" can be used as a synonym of "declare war against". The definitions are similar but I have a doubt so I asked here.
Am I to understand that my doubt about the usage of "wage war" is too basic?
What other research should I have done to solve my doubt by myself?
Why are EL&U users so quick to reject questions?