I think saying 'think of all the wonderful books I won't have time to read' is a bit like saying 'think of all the great wine in the world I'll never get a chan

I think saying 'think of all the wonderful books I won't have time to read' is a bit like saying 'think of all the great wine in the world I'll never get a chance to drink!' It's something to enjoy in your liesure time, you don't need to worry about consuming it exhaustively. The only sad thing would be if you never had any liesure time at all (you missed all your opportunities to have some).