There are a lot of things about Lucas/that he has done that we don’t have “confirmation” on. We don’t have “confirmation” or proof that he wasn’t actually assaulted outside of that bar, but from the evidence and facts we DO have, we can reasonably deduce that he wasn’t.
Same with this. Of course we don’t have access to his medical records, and Lucas hasn’t admitted it, so yeah it’s not proven. But from the evidence we have we have drawn the reasonable and likely conclusion that he was quarantined. He stayed at a different hotel than he usually does, for much longer than he can usually afford, he had lots of food delivered but never talked about where it was from, likely meaning it simply came from the hotel, he didn’t film any videos elsewhere for days, he didn’t talk about his usual shit about taking a break from the shelter as soon as he gets some money, and he even got bored enough to watch TV, which he never does.
A LOT of what Lucas does and is we have had to piece together and figure out, and that is what we have done here too. It’s nothing new.