LN solves Bitcoin scalability issues
Not entirely. It solves scalability issues at the current number of users, but to scale it up to global adoption needs other technology which is built on top of Lightning, such as channel factories.
Well or we can just change how Bitcoin works from the beginning. Nobody says that bitcoin can only have one block every ten minutes and nobody says that bitcoin will forever to it’s block size. Satoshi even talked about changing the block size in the future if necessary.
The whole point is that bitcoin is way more successful than what people would have thought when all those limits were implemented. Lightning does simply solve what the core developers do not want to do at this point. As soon as Bitcoin gets the correct update all the lightning development will be for nothing.