Except that sons of the new nobility followed their fathers into the army. Lefebvre's son died in Russia. Lariboissiere's son was mortally wounded at Borodino and his father died in Konigsberg at the end of the retreat.
Senarmont's father was killed at Valmy and Senarmont was killed at the siege of Cadiz.
Many of the new nobility were killed in action
That would be in part, no doubt, because the country was at war for over twenty years.
In the pre-revolutionary French army, not only did sons of the nobility follow fathers into military service, there was an attempt to restrict officer commissions to those of noble lineage.