Why are boba so expensive?

I've been noticing that the prices of boba drinks have been steadily rising, and I'm curious to know why. Are the ingredients becoming more expensive to source? Is there a shortage of skilled boba makers? Or is it simply a case of supply and demand, with the popularity of boba drinks driving up prices? I'd love to hear your thoughts on this topic, and any insights you may have into the economics behind the rising cost of boba.