Not sure I understand what there is to justify. Do you need to justify spending your own money on eating out, going to the pub, cinema, theatre, gig, football match, weekend trip, holiday, a decent car... you don’t meed any of these things to live, but we’re not dumb animals. We earn money to make our lives more interesting.
Seems pretty simple. You want something, get if for free legally, if not possible for free then pay for it.