Is there any point in sending kids to English kindergartens in the AI era?

To be honest, since the trend is that more and more kids are becoming proficient in English these days,
I wonder if it's even worth it.
(Just looking at how much the standard specifications have risen lately...)
The price starts at 1.5 million won minimum,
but wouldn't it be better to just buy them S&P500 with that money?
By the time they are 20, it could grow into an asset of over 500 million won,
serving as a significant nest egg no matter what they decide to pursue.
I feel like Koreans, in particular, have a severe obsession
with doing exactly what everyone else is doing.