It is a great idea! because it is a great idea to have hands big enough to do that.Some of us are not that fortunate.
I've seen lots of pretty skilled pianists on Youtube with sufficiently large hands play octaves with fingering such as 1-3, 1-34, or 1-345, especially while playing bass octaves. Is this a good idea? I can reach a tenth.
I always use 1-3 in Ballade 1 mid section.it makes octave legato easier.
*small-handed pianists who can just reach an octave and can't fit many notes in-between begin to nod sadly in agreement*