Jonzarno
The problem there and this is not pointed at chuted or unchuted aircraft is a complete lack of practice which in a single piston should priority for practising regulary .
Pilots should practice FLs as well as instinctively looking for landing areas in the takeoff and even in the cruise but apart from in a checkout few bother.
Its the same with multi engine pilots they fly single engine stuff under test but then never bother until the next examination.
So my guess is that a failure to pull off a successful forced landing is more than likely to be a lack of practice which again comes back to keeping handling skills honed
Pace