9th Av and Sefiras HaOmer

Tisha b'Av, (and the three weeks as a whole), share many dinim in common with Sefiras HaOmer.
Tisha B'Av mourns the destruction of the Beis HaMikdosh, the dwelling place for the Shechinah. Miracles were performed there daily as part of the functioning of the sacrificial service. Tisha B'Av mourns the destruction of that place where Shamayim came down to this physical world. This could be analoguos to Torah Sh'Bksav, written Torah, which was transmitted from Hashem through Nevua without human analysis and extrapolation.
In the previous post, the Chassam Sofer said that the laws of mourning on 9th Av are there to prevent one from removing their thoughts from the churban, however anybody who is truly connected to Hashem, is anyway in mourning at the catastrophy of the assault on Hashem's Presence here and Written Torah. Perhaps the same could be said of Sefiras HaOmer, such a person will automatically be sensitised to the devestation of Torah Sh'Bal Peh, Oral Torah that occurred throught the plague which wiped out Rabbi Akiva's students, who were engaged in interpereting the Torah and ruling practical Halocho.
Thus the similarity in dinim relects a similarity in what we are mourning, assault on Written Torah in Av and an assault of Oral Torah in Sefirah.