Not everyone shares your concerns. They may well be concentrating on posture, because _that is a very important thing to concentrate on_ if one has certain issues. Or they may just not consider their job taking them 5 more minutes to perform to be a problem, and they'd rather think about what they're building in their garage, or their kids.
"Why doesn't everyone care about the things that I care about" is a very good, very difficult, question to try to answer for yourself.
You're saying people don't need to care about X, which is true. However, if you choose to spend 10 hours building a pile of blocks, every day, rather than spending 10 minutes learning how to turn on the BLOCKMASTER 9000, you're just being obstinate. Hyperbole and arguments to your personal choice of block building aesthetic aside, there's a large class of problem for which the effort required to both improve one's capabilities and execute the task is much lower than the effort require to execute the task to begin. No matter how much you care about your kids, and how little you care about building blocks, if you must build that tower, it is beneficial to learn how to use the BLOCKMASTER 9000.
Pursuing the latest and greatest tooling mastery for incremental gains usually doesn't fall into this category. You don't need to pursue improvement endlessly. But say, people who refuse to learn how to use a debugger, but spend a great deal of time debugging? People who only share code over email while the team tells them to use git? People who only use global variables in painfully uncomfortable circumstances? If you're coming to work and refuse to invest in such things... it's fully plausible that you are a 0x or -1x programmer. Same for almost any other domain of work.
You don't need to care about anything. The reason you improve is because you want to be better. If you don't want to be better, and are currently bad, there's at least going to be a large social reason why you may want to change.
Plenty of people choose not to learn their tools, and would not choose to do so even if time were unconstrained. The inability of people to maximally use all tools available to them is a separate issue, and not an especially important one.