Any F/O MUST be able to manually fly a stabilized ILS approach down to CAT I minimum in any wind conditions the airplane is certified for. Otherwise he/she has no business sitting in a cockpit at all!
Obviously I can't comment about the present day, but when I left SQ they had one of the best Airline training regimes going, they had ab-initio in house training and had set up an advanced training section with a fleet of Lear Jets fitted with a glass cockpit - fairly uncommon on those days - that the students would eventually graduate to when they moved to Line Training. They used instructors from a variety of the Worlds' "Legacy" carriers so gained from a variety of very experienced personnel. SQ did their best to address the problem of experience.
Unfortunately there is no experience like experience, and this can only be realistically gained on the job, and no airline is totally safe from the unexpected, first time problem as technology advances. ( the World was better off before computers ! but I don't expect anyone to agree with me ! )
This thread has drifted into personal attacks and 'knocking' SQ, can we get back to, maybe, reasoned discussion of the technical aspects of what "might" have happened - if that is what you want, which is all we can possibly do at the moment - if we can't wait for the FACTS.