Tiering System question

why do you not work with tiering systems like these

Tier 11: Infinitesimal
11-C: Low Hypoverse level
11-B: Hypoverse level
11-A: High Hypoverse level
Tier 10: Human
10-C: Below Average Human level
10-B: Human level
10-A: Athlete level
Tier 9: Superhuman
9-C: Street level
9-B: Wall level
9-A: Small Building level
Tier 8: Urban
8-C: Building level
High 8-C: Large Building level
8-B: City Block level
8-A: Multi-City Block level
Tier 7: Nuclear
Low 7-C: Small Town level
7-C: Town level
High 7-C: Large Town level
Low 7-B: Small City level
7-B: City level
7-A: Mountain level
High 7-A: Large Mountain level
Tier 6: Tectonic
6-C: Island level
High 6-C: Large Island level
Low 6-B: Small Country level
6-B: Country level
High 6-B: Large Country level
6-A: Continent level
High 6-A: Multi-Continent level
Tier 5: Planetary
5-C: Moon level
Low 5-B Small Planet level
5-B: Planet level
5-A: Large Planet level
High 5-A: Dwarf Star level
Tier 4: Stellar
Low 4-C: Small Star level
4-C: Star level
High 4-C: Large Star level
4-B: Solar System level
4-A: Multi-Solar System level
Tier 3: Cosmic
3-C: Galaxy level
3-B: Multi-Galaxy level
3-A: Universe level
High 3-A: High Universe level
Tier 2: Multiversal
2-C: Low Multiverse level
2-B: Multiverse level
2-A: Multiverse level+
Tier 1: Extradimensional
1-C: Complex Multiverse level
1-B: Hyperverse level
1-A: Outerverse level
Tier 0: Boundless

You use a different style of Tiering but why

Tier 0: Omnipotence ∞
Tier 0.1: Omnipotential ∞
Tier 1.0: Questionable Omnipotence
Tier 1.1: Questionable Nigh-Omnipotence
Tier 1: High Nigh-Omnipotence
Tier 2: Mid Nigh-Omnipotencee
Tier 3: Low Nigh-Omnipotence
Tier 4: Abstract
Tier 5: Cosmic Beings
Tier 6: High Skyfather
Tier 7: Mid Skyfather
Tier 8: Low Skyfather
Tier 9: Trans: Sub-Skyfather
Tier 10: High Herald
Tier 11: Mid Herald
Tier 12: Low Herald
Tier 13: High Meta-Human
Tier 14: Mid Meta-Human
Tier 15: Low Meta-Human
Tier 16: High Street
Tier 17: Mid Street
Tier 18: Low Street
Tier 19: High Below Street
Tier 20: Mid Below Street
Tier 21: Low Below Street
Tier 22: Featless
Tier 23: Unknown

What is the difference between it anyways

Because the top tier is made by fanfic people and I don't use fanfic?