We can't be too sure about this till the fight happens only then can we find out if Joseph parker can beat Usyk or not. Am a big supporter of Usyk, but I also understand that Usyk cannot be champion forever. At some point he's going to lose unless he retire before then. Joseph parker has been winning his recent matches same as Usyk so you can't completely write off Parker. Parker is also showing some similarities that Usyk was showing back then when he was rising to stardom. Usyk Vs Parker would have been more interesting than what we saw against Dubios.
I voted for Usyk to beat Parker. We've seen Usyk's speed against Dubois and so even if in paper it looks like Parker might have a good chance, it might be another easy fight for Usyk here. And if he beat's Parker, then he swept this division for good. Parker's previous opponent doesn't have the boxing IQ of Usyk. They all have the mentality to brawl and uses their power but Parker is too smart with that. However, with Usyk style of a southpaw and being slick, it's going to be very hard for Parker to just play defense early and then wait for his opponent to get's tired. And so if he goes early and fight toe to toe with Usyk, he might end up like Dubois and gets knockout by Usyk.
Like I said before, am a big supporter of Usyk and I love everything he represents, his style of fighting and what he has accomplished so far in this industry. But what am just saying is that Parker shouldn't be written off until he gets the opportunity to show us what he got. I remember when Anthony Joshua was so hot and he was winning almost everything that came his way. When the chance of him fighting Usyk came, lots of people wrote off Usyk, he was considered underdog but at the end of the day, Usyk defeated him and since then he has been conquering everyone from then till this day. What if something like this happens with parker? Or don't you think that Usyk will lose a fight some day? As long as it is a competitive match I won't write anyone off, they both have the chances of winning, and if this fight is to happen, and with what Parker is doing, I will stay neutral.