Most people just don’t give a shit outside thier immediate responsibility.
Looking at the global view and actually making changes that require persuading other people is a hard and often thankless task.
Many people who do give a shit get this crushed out of them early in their career by the negativity you will face if you try.
Much easier to just accept the status quo.
Occasionally you get a group of people who really care and come together determined not to let things be crappy and they can form an organisation that is significantly more effective for a time. But once the rot of “We can’t fix things” sets in, it’s really really hard to turn things around.