I don’t think it’s about laziness, but rather about having deadlines set by management that you can only possible meet by reusing stuff as much as possible - even if you only actually need 5 % of this stuff but got to package everything of it in your application for it to work.
The good old “we were first, so we’re the only ones who belong here”, which always brings up the question, how far we want to go back in time to determine who really was first. There is no answer to this question, hence it’s the reason for so many conflicts across the globe and through history.