Pretty sure nothing that creepy was intended. More like wine is often thought of a "special occasion" type of drink (especially in the US), and so opening a bottle is a non-standard occurrence at dinner time. If you're a guest, it may seem rude to ask somebody to open their "special" wine.

But if you are cooking with the wine, you already have the bottle open. Since an opened bottle of wine will rapidly deteriorate if you don't drink it within a fairly short time period (day or so), you may as well drink the remainder, thus put the open bottle on the table (where family/guests are gathered), and it will be consumed with relish.