Breach of trust... Lowers the reputation of whoever rescinds. If a company does this they get a bad rep and fewer applicants. A employee does this and it might get around costing them job offers elsewhere.
Eh you're being too technical which would only serve to confuse the masses. Why not 'gametically' or 'zygotically' modified as per your lingo? Is delivery of mRNA to cells not genetic modification as well, I believe so
The same thing happens with IVF babies. It shakes up their epigenetics and causes a wide range of health problems which are less common in natural born populations.
The other golden age I thought of was the golden age of propaganda. Russia is the exemplary case. They've squandered Europe's access and benefits, economical and scientific, to the golden age of biology as mentioned in op.
Maybe referring to gene expression. Einkorn is a tetraploid meaning it has 4 copies of each gene. Compared with hexaploids which have 6 genes. More genes may mean higher protein expression. In some cases.