Software should be built to accomplish its purpose. It's not a special snowflake, it's a tool to do some specific job. To think otherwise is to setup yourself and your company/team for disaster.

Kernels, compilers, language runtimes, databases? Sure, build them to last. Web pages that will not be used in 2 weeks? Don't waste your time with "build to last".

The problem is that some of us think that our software should be build to last - but in reality it's just some mediocre thing that needs to get in front of the clients as fast as possible and some bugs are "OK" to live with.