Upvote:11
Typically the visa centres are overworked and they do not have the bandwidth to deal with incessant questions "is my visa done already?" two hours later "what about now?". It sucks I know, but there's nothing to do but wait. First hand experience: I needed to wait several days for the paper to arrive in mail after the online app switched to "decision made" on my three year long citizenship application to know what the decision is!
The security concerns would be easy to solve by giving everyone a PIN / password, that's not where the problem is.