Why is it so in mobile development that 90% of projects does not have proper architecture, and when there is one, devs complain about it. I don't see it being a case for other technologies of development, only mobile. In mobile the project always has spaghetti code, barely any abstraction it is developed just to be finished as quickly as possible and that's it. And when there is clean architecture introduced, everyone complains. Why is it just a case in mobile development?

Just disclaimer: It is not like the architecture in project is completely new invention, it uses well known principles and approaches