I can't find any sense in ChristianKl's answer, but maybe that's just me.
My basic problem with your position is that "conventional modifications via breeding" are better described as picking from a set of random mutations those where the phenotype looks appealing. I don't know why you think it's a safe method, especially compared with making targeted genetic changes directly.
I completely agree that breeding methods have their own flaws, which we certainly have seen come to dangerous fruition (pun definitely intended).
I also concede that breeding is quite slow in improving a plant, where direct modification would be much faster.
I furthermore agree that direct genetic modification is the future of crop improvement. Given that we better master the techniques and better understand the genomes in play every year, eventually direct gene modification will lack any of the uncertainty that I invoke right now.
But I likewise think it is ...
Basically: How does one pursue the truth when direct engagement with evidence is infeasible?
I came to this question while discussing GMO labeling. In this case I am obviously not in a position to experiment for myself, but furthermore: I do not have the time to build up the bank of background understanding to engage vigorously with the study results themselves. I can look at them with a decent secondary education's understanding of experimental method, genetics, and biology, but that is the extent of it.
In this situation I usually find myself reduced to weighing the proclamations of authorities: