Just the usual hand-holding regulations you find in a lot of games.
You enter the usual "base"/"HQ locations in games and a lot of features are limited or blocked.
Can't use weapons, freedom of movement restricted, item usage and such usually restricted.
RDR2 you can't use your weapons at camp, MH: World you can't use items or wield weapon in the town, etc. etc.
The Concourses are just for show, FDev doesn't want CMDRs jumping around and shooting NPCs and flying around the Concourse for whatever reasons they have (I say it's because they're fun police and boring old sticks in the mud.)
Though there are videos of players glitching out and floating around the concourse or using their weapons though they do no damage.
Basically, game developers are no fun and don't like players getting into hijinks and antics
