Because we're not doing those things at the moment?
Having a solution available doesn't make it not a problem.
Something having a problem doesn't mean it's not worth doing, and not all problems are bad things, they're just things that need figuring out.
People too often think that identifying an issue with something means that it's being argued that we should abandon it or that it's unfixable.
Solar is not a perfect technology, because there are no perfect technologies. It has solvable problems are or will need to be addressed as we keep using it. That's fine and normal.