Heh... yes... but only if they actually know T-SQL very well first. 😉 Many people fall way short in that area and then resort to other things to try to make up for their lack of knowledge in T-SQL because they frequently don't even know IF T-SQL is capable of doing something.
Yes, but.
Different tools do different things. I like to use R for some visualizations that SSRS doesn't do well for me, also keep trying to dream up new ways to visualize existing data for others to get better use out of it, and R has a lot of capability for a pretty low learning curve. Also a lot of depth if you want to apply statistical analysis and understand how to do it properly (not necessarily me, but always trying to learn more)
Valid point, but I can't see how this negates Jeff's comment in any way.
If you haven't even tried to resolve your issue, please don't expect the hard-working volunteers here to waste their time providing links to answers which you could easily have found yourself.