It's not dangerous or difficult to land a jet without an ILS, it gets done hundreds of times a day ( maybe thousands).
It is dangerous to have pilots who don't have a solid background in manually flying aircraft being asked to do it once a year or less. (Ie when an ILS becomes u/s)
Training is the only answer to this burgeoning problem.
Training costs money.
The only solution is to mandate by law that the required training takes place, that way all airlines face the cost and simply pass it on to the passengers without losing any competitive ability.
It's that simple. Installing ILS's everywhere won't help. The same flying skills that carry out a visual approach are needed in other situations as well such as AF447.