What do you think pilpul shel hevel means? It refers to stam connecting things.
No yeshiva guys do that; our pilpul is about figuring out pshat and svara in rhe and rishonim. Most chabad yeshivos do this too; im referring to what you find in rav Akiva eiger, ketzos, shmaatsa, reb chaim, rav baruch ber, rav elchanan, etc…those are not pilpul shel hevel cv”s