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> It's actually a bad move from a business perspective to spend the effort to provide security and quality
No it isn't. It may not make sense in the short term, but the biggest companies on the planet (GAFAM, FANG, whatever you want to call them) use solid engineering principles for long-lasting success.
Generally speaking, small and medium companies don't care about these issues until it's too late, and they're hacked, for example.