no. this is not it at all.

attacker (with collaborator) opens 2 channels with you, is routing through like this..

attacker -> you -> collab -> destination

funds locked in htlc along the way. while your funds locked, collab doesnt return and goes offline. fees go up higher then the transactions you and collab originally signed. eventually attacker can broadcast their older state before the spend you have locked in htlc without the preimage returned by collab. attacker can bid up tx for new fee rates.