Problems are inevitable (Score 1)

One almost insurmountable problem that software developers face is that software has to be perfect in order to work. Bridge builders don't have this problem; if a rivet isn't positioned properly, other rivets serve as backups. Developers can't write a backup subroutine that kicks in if the first one fails.

Another problem: a software company that tests and re-tests until all bugs are eliminated will quickly go out of business. Other, less picky companies will get their software out first and capture the market.

Given these difficulties, it's no wonder that there are problems with software.