Astarion practicing lock picking for 200 years
Something hilarious just occured to me ...
Astarion is a Vampire ...
Vampires in DnD cant enter houses without permition ...
Meaning even if he would indeed spend last 200y picking locks ... what would he do with such skill?

Can you imagine?
He sneaks up to a locked door/window ... pulls out his trusted set of lockpicks ... silently open said door/window ... and then say "oh ... right" ... and just leave, since he cant enter anyway. xD