*"But our team knows React..."*
THAT IS NOT A THING. They don't know "React", they're on a continual treadmill[1] of React sub-variants, bundler configuration micro-languages, and one-off plugin amalgamations.
THERE IS NO INDUSTRY STANDARD REACT STACK. IT DOES NOT EXIST OUTSIDE OF TOYS.
And if your website is a toy, why would you let that nonsense anywhere *near* the door when simpler, cheaper options have always existed?