That shyt does affect your shot.I was the exact opposite growing up.I felt like I shot better in T's than I did in jerseys.I felt like the T's hugged the skin and made my shot tighter.Gave me better form.I felt like it was actually bracing my J form
Maybe that came from years of practicing my J wearing T shirts.For whatever reason, I felt to loose in a jersey.
It was 98% mental, but as a shooter, you want 100% alignment on your J.Form, rythm, feel etc.
If one of those is even slightly off, it's enough to fukk up your shot