[jefb]

I don't think there is a single correct answer here, but I'll offer a few insights from personal experience.

Firstly, valuable data tends to live in places accessible via web technology. Maybe you need to fetch a bunch of XML files from an FTP site? Having a clear understanding of all the nuances you're about to encounter will set you up for success.

Secondly, valuable data tends to be generated by web technology itself. Understanding that lifecycle can inform analytical strategy.

Finally, some data scientists add value by informing decision makers. One of the most powerful things you can do for them is give them a mobile friendly secure web experience that puts the data they need directly at their finger tips. While yes, Tableau et al. are an option here, you'll be ahead of your peers by knowing how to DIY it when it counts.