The grace and heavenly treasure are funny things. It is not enough that they are present, people had to receive them. The bishop is responsible for his flock, and the goal is to keep them and make them receivers of the grace.
In 2010 in England they made a poll: 40% of the Catholics who attend Masses regularly would be ready to to attend TLM. This is 10% of the total number of Catholics.
In the Church what I attend since the Ordinary Form is offered toward the Tabernacle, the Holy Communion is received kneeling at the bars of the altar people turn from the TLM to that English Masses. TLM is offered since 1994, the East (tabernacle) facing celebration since 2008
Given this fact the bishop should prefer the form which draws more people.
The bishop can do what Bishop Finn did, celebrate TLM, establish a personal parish for those who want the TLM, and outside of that promote the Ordinary form which draws 10+ times as many people to Jesus Christ, who is the same in any valid Mass.
The holiness is different. Holy (sacred) is what is set aside to God, separated from the world. The more holy is meaningful, but only for a small segment of the population for the contemplative orders. The rest, including the hierarchy, the diocesan clergy shall live in the world and for the people of the world.
**the visible problem with the Holy Mass was that the Mass was entirely the affair between Christ and In 1950 the priest, people were not even listeners, they were mere spectators of this affair, They get together because there was nothing else to do, and that was the tradition, but they prayed the Rosary, walked the stations of the cross, read from their books., slept, gazed the other side (girls boys and vice versa). They were only physically present, and this was the requirement. **Twice a year they confessed their sins, and the next Sunday they received communion. The regular time for a Sunday Low Mass with 3 prayers for each collect-secret-postcommunion, reading the Gospel in vernacular, with sermon, some receivers of communion and the Leo XIII prayer at the end, - took less than 50 minutes.
Can you suppose that the priest listened what he read from the Missal in Latin in soto voice? Should any bishop want this back?