You are avoiding the main point that Umar did in fact not pray tarawih.
Abdur Rahman bin 'Abdul Qari said, "I went out in the company of 'Umar bin Al-Khattab one night in Ramadan to the mosque and found the people praying in different groups.
*
Then on another night I went again in his company and the people were praying behind their reciter. *
So the importance of tarawih is destroyed by the fact that the person who initiated the practice did not participate.
Now coming to the point you are constantly trying to make despite all evidence to the contrary that the prayer practiced by the Prophet (SAW) and the people during Prophet (SAW) and Abu Bakr’s time was not tarawih but Tahajjud. A sunnat-e-mukadda and a recommended prayer specially in the month of ramadan.
Let me know if you can’t find this and i ll copy paste all the ahadith once again.
I can get you quite a few quotes from Ahl-e-sunnat scholars on the importance of reciting quran during Tahajjud Salah and that is exactly what was practiced by Salaf.