Because the OF Mass is an improvement on the EF Mass.
There are things that are tangibly better with the OF than the EF. How the OF Mass facilitates insight into the word of God through additional exposure and homilies focused on the readings is a huge improvement.
Not been my experience at all. In fact, the exact opposite.
I’ll never go to the OF again… ever. I’ll drive across country, sleep on the ground and go hungry to do so to have the TLM. In fact, it would not be hyperbole to say I’d starve to death to retain access to the TLM. I wouldn’t go to the OF again if it came with $1000 cash each time I walked in the door, a 5-star level meal afterwards, and was a 2 minute drive!
The lack of prayers and the type of prayers retained are absolutely deficient to understand the Mass as a Sacrifice in the OF. As a former Protestant, I saw nothing different in the OF other than the Eucharist. It was as insipid as the community hootenanny I grew up with. The English flew in one ear and out the other. The Latin makes me concentrate. It took me… maybe a month to start following along in the Latin and understanding what was going on. Had I grown up with it, I’d have been quite proficient in no time.
I have in my possession 3 types of Missals. One from the 50s, the 1962 Missal, and one from the entry of the OF. The OF Missal I have, from the 70’s, has the language “we believe” in the Credo…

Talk about a break from the Latin!! Credo is no We Believe, it’s** I **Believe…
The Judica Me, etc are NECESSARY to understand what is happening.
The repetition of those parts are NECESSARY to understand the gravity of sacrifice.
Reading the Mass of the Catechumens and Mass of the Faithful is catechesis in itself.