How is that mindset lazy?
Are you really asking how it's lazy to pass unoptimized code to a customer and make their hardware do all the work for you because optimization was too costly?? Like I get that you are in an Enterprise space, but this mentality is very prevalent and is why computers from today don't feel that much faster software wise than they did 10 years ago. The faster hardware gets, the lazier devs can be because why optimize when they've got all those cycles and RAM available?
And this isn't a different at you, that's software development in general, and I don't see it getting any better.