Being opt-in is a feature, not a bug. Because of Monero's privacy not being opt-in, there are so many exchanges that simply blacklist it. But being a hybrid coin will mean that you can use privacy when transacting, but can disable privacy when you need to interact with exchanges.
> What Litecoin provides is far from what Monero provides.
Monero's privacy technology is a bit more nuanced than Litecoin, but again, this is also a feature, not a bug. Litecoin's technology being simple means it's more difficult to get wrong, and also allows for scalability overhaul improvements, which cannot be applied to Monero (read the MimbleWimble whitepaper for more info on this).
> What Litecoin provides is far from what Monero provides.
Monero's privacy technology is a bit more nuanced than Litecoin, but again, this is also a feature, not a bug. Litecoin's technology being simple means it's more difficult to get wrong, and also allows for scalability overhaul improvements, which cannot be applied to Monero (read the MimbleWimble whitepaper for more info on this).