Yes, which is pretty much the answer to the original "why.". Different skill sets. You can't necessarily compare two wholly different stacks and say one is just as good as the other so why don't you use mine when there is accumulated knowledge associated with both. I have seen people arguing that rails is hard to set up in this thread, too, which seems really strange to anybody who doesn't consider setting up homebrew and rvm a burden. People have different things they have done and are familiar with and are productive at doing again. I think that is the complete answer to the thread.
My current go to for quickly starting projects is spring-boot, jooq, and postgres.
And the basic jvm settings will get someone a long ways - much farther than an out of the box Rails setup.