Everything is disposable. Some things more than others.

Some people can't figure out what end of a screwdriver to hold. If they can buy a new bike $150, and the repair on their old bike is more than $150, then it might make sense to them to just replace.

Don't forget, this is a world where people will trade-in a car so that they won't be shocked by a sudden $2k repair bill--while ignoring the fact that they just spent $25k to save $2k. Logic sometimes isn't a linear thing for everyone.