Fair question... bear in mind however that some people pay thousands for their bikes... and their bike may be their only form of transport. Back when I lived car free... I had no qualms about spending heavy for my bike... it was my only ride and still far far far cheaper than any motor vehicle... and I wanted reliability.

I actually have a secondary light and a tertiary light on my bike. Back then I also had several types of blinkies. There was no way I would be stuck after dark without a lighting system. (I also happened to love riding at around 10PM... so this was a real issue with me.)