Why do I always need to rationalize use of proper architecture?
The way I look at this, it's all about incentive.
If the product you're working on is a SaaS product, and the way you design your architecture aren't allowing you to be agile and flexible in order to respond to changing business requirements quickly, you'll lose clients.
OTOH, if you're an outsourced dev working on an internal org's application. Your likely reaction would be: "Who cares? I'm still being paid."
It's all about incentive.
