If you read the NT back into the OT, it is a trivial matter to impute to a passage a meaning that would not be gained from grammatical and historical associations. I.e., you can read into the passage whatever you want.
Instead of considering textual, grammatical, and historical factors as the primary instruments for interpretation, the non-dispensationalist considers theological factors of primary importance. The OT context is downplayed and gives way to the NT theological interpretation. I.e., by reading the NT back into the old, you minimize the OT background of the NT text ... and at the extremes dispense with it altogether.
By starting in the OT, the dispensationalist enhances and expands the NT understanding as he already has his Biblical theology of the OT in hand when he comes to the New. When you start in the New and read back into the Old, the tendency is to undo or replace the understanding that would have been had by constructing a true Biblical theology of the OT.
IMHO, the article manifests the mindset of many “reformed” believers who attempt to find solace by rationalism, worldly club attendance, and adversarial attacks upon those who simply believe in God through faith in Christ who aren’t members of their club.
IMHO, insofar as we remain faithful to God through Christ, all we need to know is what is available in the younger earth interpretation. Likewise, we know His return is imminent, not immediate. Those pastors associated with dispensationalism come closer to grasping His Word from the work of the Holy Spirit, than those who attack ‘dispensationalism’.