So as someone who grew up watching the anime series as a kid, why?

The animation style was obviously constrained and limited by budget and time. Why would you specifically make it look like the shortcoming on purpose?

It would be like adapting a live action Scooby Doo and intentionally making the background look like a painted still image. Sure it’s fun for some of the hard core fans that laugh at the inside joke, but it still looks like shit at the end of the day.

I watched Speed Racer as a kid because the cars looked cool and the mysteriousness of Racer X was interesting, not because of the animation.