Actually I think it's a really bad thing for people to use the database for specific moves in a game.
Ideally the database is something you explore after your game...or to study openings and variations in general, not to use against your opponent's specific move?
A direct way to access and bookmark the chess database (from the opening explorer) from the games is needed to save an immense amount of time during the games. Especially for those who have tons of games at one go.
Databases are always available for everybody, and everybody ALREADY has access to them. It's not like it should be one big secret.... Tons of external database websites and chess.com own internal facility exist. So why not just make it directly linkable from the games?