More themes and strategies are actually opened up to players when they build around a strong game plan first
If they really wanted to use it, would it just be used to keep the opponent in check by stealing their key card
While Holo Charizard is the only card that was obtainable for casual players, that doesnt decrease the value of it: a 2018 auction saw one went for the price of $55,000
In constructed formats, you can just re-cast another copy to get rid of it if it gets too many counters, and in Commander, your life total starts so high that it hardly ever matters
Even booster boxes from less iconic sets (Jungle, Fossil, Team Rocket) have seen their value increase considerably
Just like with the Charmeleon and Charmander cards, Pikachus Shiny Rare makes the Pokemon pop like it never really has before