Phil:
There seems not to have been enough ice to cause the icing
For each side, something on the order of 20,000 gallons of jet fuel with an enormous number of tiny suspended ice particles transited through the fuel system for upwards of ten hours. The accretion of ice is to be expected.
And, unless this accident is properly explained a similar one affecting a totally different aircraft/engine configeration might occur.
It is perhaps likely that thousands of flights in similar profiles over the years have been close to succumbing to ice accretion induced trouble, only to have landed in time.
Some by minutes, others by hours. That doesn't change the
phenomenal statistical success achieved to date.
You may feel better if you join a rheology forum and a fluid dynamics forum and demand their immediate combined action on sub-zero kerosene ice and its accretion properties in tubular delivery systems.