One relevant quote from the wiki is this (emphasis mine): During the Summon response window, due to Fast Effect Timing, first the turn player must activate any compulsory effects that they triggered, such as "Summoning Curse" and "Summoner Monk", then their opponent must do the same
Clear, Safe, and Reliable Protection for Your Cards Manufactured with advanced technology, Gilbert sleeves boast high clarity, allowing the artwork on your cards to shine through without distortion
The Contents A few days later the cards arrived
Partnered together, the player is able to check the cards that they could potentially force back into their opponents hand
Not only do these pieces prevent life gain, but they essentially put a time limit on the game with their constant pressure
No ability to protect herself is a serious downside, and its not like she has all that much loyalty early on