Cutting through Joseph to reach Lovers is definitely unique. I’ve not seen anything like this in a battle shounen before, maybe The Magic School Bus, but not shounen. It made for some fun antics, the people nearby thinking that Joseph is senile and all. But Lover’s is a threat, it’s creating brain clones, feeding the spore, and injuring our boys. If Polnareff and Kakyoin can’t stop it, then Joseph will die and Jotaro will continue to humiliate himself.
Speaking of that though, Jotaro is taking notes of everything Steely Dan has done to him so that he can pay him back. As much as he could hardly be stopped from beating him earlier as he attached to Joseph, he knows how this works! Meaningless pride paving the way to defeat isn’t the way, swallow that pride, take your punishment, and make sure to get payback later when you can manage victory. That’s how you do it, and Jotaro knows this, his unflinching confidence intimidated the man who is in an otherwise dominating situation. He's definitely a manly kid.
There was also a line about how shrinking stands costs much energy to do which goes to say, shrinking or growing probably won’t come up all that often.