If it just drives you nuts that your opponent gets to start the game at 20 life and you want to remedy that as quickly as possible, this is your deck
This is true, but also if your opponent just attacks or damages Chandra, Fire Artisan, it will also deal damage to your opponent
Additionally, potentially, it might simply be because players find free spells explosive and sudden, and in that respect, unfair
There are, however, several ways to dig for more cards
(Though thats definitely part of it.) While comparisons to Magic: The Gathering are easy - there are a number of keywords with specific in-game effects, cards battle using two key values for their attack strength and health, and you can gradually play bigger cards as you build up your stock of in-game resource - Lorcana doesnt just whack a set of Mickey Mouse ears on the veteran TCG