From your comments, this is like asking "Why would someone, programmer or not, want to learn Lisp online?". The answer: because they want to, because they might find it interesting. They don't have to ask you. You may not like something, but that is your preference. Don't impose it on us.
The parent has been commenting asking people why they want to learn Sanskrit when there is "infinitely many other" things to learn about. I bet that you can not learn Lisp and sail through a great programming career. And I really don't think Sanskrit is a "dead" language - it is important to far too many people to be called dead.
If you look around and read their comments, they are asking people for a justification why people would want to learn Sanskrit in spite of "infinitely many other" interesting things that are supposedly out there to learn. I call this imposition. If you don't, that's a boundary issue :)