I don't think anyone's forcing you to use the rails CLI's "new" command to start a new rails project, if you're concerned about all of that and just don't want

I don't think anyone's forcing you to use the rails CLI's "new" command to start a new rails project, if you're concerned about all of that and just don't want to deal with it... the docs explicitly say that this is a convenience method for getting started quickly with everything they think a modern developer would want. If you don't want that, that's a perfectly fine choice -- just start a new project from scratch, instead.