Booking too far in advance

Nowadays if people want to get tickets for an event, be it concert, theatre, sports or holiday, they have to book months in advance, sometimes up to a year, in order to secure tickets. I'm always wary about such optimistic future bookings. Firstly, it's such a burden. How do I know where I'm going to be in six months time on that date? What if I make other plans? What if I don't feel like going? What if I get run over by a bus? What if I'm in Tahiti? What if I forget all about it? I can barely think a week ahead, let alone months. Secondly, and this applies perhaps most to a music concert, will I like the band I've just booked tickets for six months from now? It's probably doubtful. I'll either have played them to death and got bored of them or forgotten all about them. Thirdly, and perhaps most importantly, if I've booked a few tickets, to go with a girlfriend or friend, say, will I even be in touch with them that far ahead? No, the idea of booking in advance seems fraught with too many uncertainties.