In my experience working with people who didn't like to help people or people who helped people whenever they felt like it, they became managers or already were managers (because of course you can be super productive when you only help people when you feel like it) and then had revolts of people they managed when everyone got sick of having to waste hours because the other person didn't want to give a few minutes. People showing up late, missed deadlines, and just a general not caring about the company after so much disrespect. If you don't care about the company and just your career, you can continue to be hated and selfish, but it will come back to you if you ever start a company or want to advance past that level.

I was a naive intern at my first paid software gig, so I towed the line, but I watched as a startup went from hiring some very smart people to the engineers realizing they could come in at 11 hungover and leave at 4 because they were all smart, management was treating them like crap and they couldn't just fire everyone. There were other issues, but power tripping over personal productivity and not giving engineers time for help or questions about the business was a huge issue at that job.

This is not a promotion of the anti-WFH control busy body managers, but just know if your coworkers are asking you questions so they can do their job you should be mentoring them so they need to ask less questions. If you're the type to answer a slack message hours later, people are slowly growing to hate you and will eventually sabotage you.

Because 10 minutes of your time might save hours of someone else’s. Why is your productivity more important than your entire teams?

I feel like people don’t treat achieving business goals as part of their job in dev. I’ve never had people treat this as a problem across other job roles.