Can I safely assume you believe Biden is lying about the paid sick leave? Or do you think he won’t be able to deliver?
Lying, yes.
If you think he is lying, can you name a politician that you feel has never lied (including by omission), misrepresented, over-promised or under-delivered?
No, but that doesn't make it seem less likely that he's lying.
More seriously, "but mum, all the other kids/PotUS were doing it" isn't a defense.
In Biden's case, he's lying (or seems to be) about a particularly important issue in a particularly blatant way. He's made several lies like that before and they've hurt his party. Now, I don't for a moment believe that he's actually trying to make the GOP win, but I can sorta understand why people make that claim. The lower classes of the US aren't doing well, and he needs their support, and he's not giving them much in the way of reasons to support him.
Yes, but why wouldn't they simply not pay you for the day you didn't show up? It doesn't mean they fire you for being sick or taking sick days so long as you don't do it excessively, it just means they don't pay you for that particular day.
If you're a low paid worker with bills to pay, and you need the money, you'd be forced to come to work sick. This bit people hard during the earlier stages of covid, and it's not a good thing in any case.