Things don't work this way because decks at the end of different Standards are built for their own specific metagames. For example, consider this Fires of Invention deck in current Standard.
Obviously most of the cards in this deck are for furthering its own proactive gameplan, but note some other card choices:
- Justice Strike: you might think this is generic removal, but if the key threats in the format don't have more power than toughness, it's actually a bad card. Some example of threats from recent metas which Justice Strike is really bad against: Shalai, Voice of Plenty; Trostani Discordant.
- Tithe Taker: the main reason this card's in the sideboard is to fight Simic and Izzet flash, two important decks in the current metagame. They're generically good against counterspell decks of course (and counterspell decks are in most metagames), but the current meta requires some especially harsh countermeasures because of the flash decks.
- Aether Gust: obviously if the metagame weren't heavy red and green, this card would never make the sideboard, let alone the maindeck.
Compare that to this deck from Worlds 2018, several metas ago. If you try playing the two decks against each other you should see one major problem immediately. The Fires of Invention deck literally cannot answer Hazoret the Fervent. Hazoret attacks through all its blockers, presents a fast clock, has Haste (i.e. resistant to bounce), and pretty much walks over the deck on its own.
Does this mean the Fires of Invention deck is poorly constructed? No, it just means the deck wasn't constructed with Hazoret in mind. Cards that can answer Hazoret do exist in current Standard (e.g. Devout Decree, Prison Realm), but the Fires deck isn't playing them because it's not expecting to have to answer Hazoret. If Hazoret suddenly became legal in current Standard you can bet that the Fires list will adapt. There're tons of other examples: e.g. Deafening Clarion is a bad card if the key threats in the format have >3 toughness; Goblin Chainwhirler meant that for a long time, anything with 1 toughness (like Paradise Druid in the current metagame) were suppressed.
tl; dr: you could pit Standard card pools against former Standard pools (although even then I suspect it'll be unbalanced: some pools are simply going to be more powerful than others), but to pit decks against other decks is a disaster waiting to happen.