Often the blame will lie with someone else - the designer or the PM. Some webdevs are to blame, but many of us would prefer to work on tasks OTHER than arguing with the browser over how it should do it's job.
The most common source of blame for scrolljackers are wordpress template writers. There was a huge surge in developing them a few years ago that happen to coincide with popularity in scroll-jackers actually being considered good. Mostly because of the Windows crowd not actually having a great scrolling experience like Mac. Now windows scrolling is 95% on par with the mac, but alas, the scrolljacking stays with us until people migrate off wordpress or people are interested in developing for wordpress again.
