It surely is fast enough, I'm not blaming people who use Tableau.
But "faster" compared to what? It's not faster than pandas/seaborn, not faster than d3... even just for super simple stuff where GUI tools shine.
If the final solution needs to be somewhat self-service, then sure, you can't expect the end user to write python or javascript, and Tableau is fine. If the end result is just a report that some technician has to prepare, then I sincerely doubt it's the fastest way to get there, even ignoring maintainability, source control, etc, where it's just a no contest.
But "faster" compared to what? It's not faster than pandas/seaborn, not faster than d3... even just for super simple stuff where GUI tools shine.
If the final solution needs to be somewhat self-service, then sure, you can't expect the end user to write python or javascript, and Tableau is fine. If the end result is just a report that some technician has to prepare, then I sincerely doubt it's the fastest way to get there, even ignoring maintainability, source control, etc, where it's just a no contest.