Hebrew was developed as an alphabetic language to replace a symbolic language, which makes the language MUCH easier to learn (and if necessary to crack). Greek added the improvement of promoting vowels to full letters.
The issue arises when you write the word out; when speaking it, you’d use the intended vowels. But the difficulty is still there in writing – the context may not say whether SHN should be pronounced “sheen” or “shine”. This does cause translation problems.