[scrubs]

The OP's post is true iff you limit your timeframe to near term and if you luck out and get all or most of the domain requirements in early and they don't change or one decides the complexity and labor to evolve those requirements doesn't warrant potential income it might garner.

My employer started quickly and grew exponentially ... but ... our client requirements didn't stay fixed. What were N pieces eventually had to be integrated because clients didn't wanna hear subsystem N1 works with N3 but not N5. And after around 10 years a lot of that code became debt, and the company has had to fix/remove/evolve it while it works in production for any number of reasons: it's too slow; it doesn't scale; we relied on vertical scaling and that's long dead; can't know or can't well manage capacity concerns; customer A's load breaks customer B's work; the code is so over hacked it's a big ball of mud etc.. And eventually software engineering concerns become cool again. This is a long way to say that true success inevitably brings with it the need to expand and integrate. Here maintainability is a core business strategy.

Here's something else worth remembering: the old school idea of TQA (true quality attributes) v. SQA (substitute quality attributes). Nobody (minus experts) rolls into a dealer and starts by asking the steel v. aluminum mix of the block. They don't ask how mm of coating was put on the __widget_here__ Those are SQAs. They ask about TQAs: price, quality, warranty, HP, resell value, whether it has AWS, power steering etc... but if anyone of those things breaks and the dealer has to fix it or the manufacture has to do a recall, the focus goes right back to the SQAs, the opportunity defects which allows those crappy SQAs etc.. etc.. So yes the client doesn't care what's under the hood, until one day you have to because one of the TQAs is violated. SQAs are the producers/suppliers implementation to gain the TQAs. They are separated in time --- time to when the client sees an issue --- but not in cause and effect. Software isn't magic. A lot of the SQAs eventually align with maintainability for the long haul.