Would that be because e.g. an alphabet or a language (notably English) is not a product with a solid reasoning behind it (like Esperanto is iirc) but an evolution? Like a cultural thing? There's no practical reason why certain combinations of letters in the English language are pronounced differently depending on the words, it's just a "that's how it is" thing which you have to just remember.
Fortunately, most things in modern life require no active memorization. You use and you remember.
But if I were to learn Hindi, I would memorize the basic glyphs of Devanagari. It’s the highest ROI operation for the task.