A bad developer will produce bad code in whatever language he is using. If asked, I’d tell everyone “stick to your guns”. Use, whatever gets the job done most quickly and efficient.
Also, as we are talking about web development, what is best tools? ASP.NET? Rails? Django? Go? J2EE?
I do disagree with that statement "Ain't nobody got time for that." If you are going to spend 3months working on something, it's worth learning to use a new tool that is best for the job.