No, it's not "unfair". You chose to buy them, you didn't have to. People who buy monthly lenses generally wear them every day for a month. You're making a decision not to do that. If you only wear them on occasion then why on earth wouldn't you get the dailies? One "month" of dailies would last you ages.
Chances are you'll be fine, but is your eyesight really worth the risk over the "unfairness" of having spent a few quid that you don't feel was worth it?
Saying "it's just not fair" really makes you sound incredibly immature. You're given medical advice for very good reasons, and "fair" really doesn't come into it.