If you want to be great at your job, then understanding the context of business and product decisions will let you make more nuanced technical decisions that support where the business is heading, not just where it's at today. If your manager, and PM, and business POCs that you work with are all excellent, then maybe you can get this context from them. But chances are that at least some of the people around you are fairly mediocre, and part of being great at your job is making things happen in spite less than ideal circumstances.
Maybe what I would consider being great at the job is what you would consider unhealthy hustle culture, and that's fine. If you want to just get by and not be exceptional in the role, that's much easier. But in that case, why even focus on technical excellence? You can get by with less.
Basically, if you're gonna slack off, then you might as well slack off across the board. If you want to be excellent, then be excellent across the board.