There is actually a legitimate difference between Pokémon and the early 90s sports bubble, pokemon is still only printed by one company. The early 90s bubble was due to multiple companies printing a metric ton of product. It was the beginning of numerous rookie cards. For context, 1979 gretzky had the opc rookie (Canadien release) and topps rookie (American release) both the same art/card. A current player today easily has 50+ “rookie” cards, from many different companies.
Even with 3-4 versions of some pokemon cards in a set, it’s nowhere near sports cards. Especially since most of the Pokémon cards are chase cards, some the hardest cards to pull. Plus there is no game mechanic in sports. The 3-4 different versions in Pokémon actually have a purpose besides making money.