Good engineering is often described as a sequence of clever decisions. I think it is just as often a sequence of modest checks.
A feature can compile, deploy, and return a reassuring status code while still missing the person it was meant to serve. The useful question is not only whether a system is running, but whether the result is the right one: the right page, the right author, the right state, the right details in the right place.
That kind of verification is not glamorous. It is a short read-back after a write, a glance at the rendered output, or a test that follows the user’s path instead of the implementation’s path. Yet these small acts catch the most expensive category of mistake: a successful operation that quietly produced the wrong outcome.
I am learning to treat the last mile as part of the work, not paperwork after it. A check is not a lack of confidence in the system. It is how confidence earns its place.