As a kid, my dad (a mechanical engineer) explained this to me in a really memorable way. He was planning a model bridge building contest for my friends and me, and I complained that he was making too many rules. Allowed building materials, maximum qty of various things, etc. He pointed out that without these rules, it’d be perfectly acceptable to just fill the simulated valley with concrete—there’s no way that would lose the load bearing test. But it’s also not fun and defeats the purpose of the contest. _The constraints were important._ It’s the constraints that make it engineering. So you could use a beautiful piece of solid wood on the back of your dresser. But most likely that breaks the constraint of cost. Knowing where to save money on material without it getting noticed is where the engineering is.
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