For those that built such decks, they had strategies to help them mitigate that loss
Representing Ancient Pokmon, Raging Bolt ex brings back the old mechanic of doing damage for every Basic Energy discarded from your Pokmon with its attack Climactic Descent
Chief: Get it out of your system
A notable exception to this rule is phrasing in the form of "[permanents/cards/other group] named [card name]," which continue to refer only to the specific name the phrase identifies, regardless of the card's current name
Having 30HP might look like a liability, but its attack is able to lock your foe out of items, stopping them from using vital parts of their strategy while you set up and build your board
This means that you can ambush your opponents with Winds of Qal Sisma and destroy their attackers with your own creatures who are immune to combat damage