Because CPAC is compromised. The left infiltrates institutions and mediums that already have a wide audience and corrupts them. The left’s ideology doesn’t spread organically so they inject it into cultural vectors that already have the following and then change them gradually. Hollywood, professional sports, Netflix (Susan Rice joined their board in 2018), Fox News (Paul Ryan joined the board of Foxcorp in 2017), social media... like a cancer.
Discovery won't help if there's nothing to find. Dominion has had ample time to cover their tracks. The fact that Dominion are the ones filing this lawsuit, and the fact that they're doing so in spite of the possibility of being hanged for treason, suggests they're not expecting to lose.