I think it's a fair argument. If I never heard of soft blocks (which I did not until yesterday (because I don't use Twitter)) I'd probably assume there was a glitch. It wouldn't occur to me that someone could think a soft block is a better option than a hard block.
I still don't get the point of a soft block. "I don't want this dude following me, but I want him to have the option to follow me." Fuck, why? Do you have to pay Twitter for a hard block?
I'm not criticizing Ellis for strewing Film Robert's viscera across the Internet, it's delightful to see a bad person publically humiliated. But I just don't get why she didn't do a hard block. Some people in this thread claimed a hard block would "invite drama". Yeah, like a public call-out doesn't.
People are funny and I won't claim this is the only explanation, but "Ellis is too drunk to work the block button but not too drunk to type" feels plausible to me.