This is so dumb.
1) No, it doesn't make you a better driver. Here's a study about it:
Results: Subjectively, participants report being more attentive while driving in manual transmission mode. Objectively, participants drive safer in the manual transmission mode.
https://pubmed.ncbi.nlm.nih.gov/17085632/
2) Unless you are living in the country with no traffic, there is no point. It's not fun in stop and go traffic, which is what we have here in DC.
3) there's no longer any fuel efficency to be gained.
https://pitstop.rumbleon.com/automatic-vs-manual-gas-mileage
IF you want to enjoy a manual car on the open roads of the American west, go for it. Puttering around the beltway, however, will be a huge pita.