That’s the whole point xD
tbh it will be more beneficial to stock more block or evasion in Re:build (Molich or Velorchard cards) as evading attacks that knock back/down evades the effect,too, and blocking also negates getting knocked around (active block on Peltasta via C even negates knockdown/knockback completely, regardless of the block being successful or not).
Triggering a 10 second knockdown/knockback protection buff will over time yield probably worse results than evading and blocking. Even worse, if you stack evasion, you’ll probably lower the chance of Gazing Golem card effect triggering.
The only point where I can see Gazing Golem card being useful is in high stage CMs (stage 6 & 7) and some raids (Asio raid initial stage has some nasty knockback/staggering, so channeling/casting might be problematic/hard without Pain Barrier or really high evasion).
In “endgame” content, I doubt that even after the Re:build changes to bosses, people would like to deliberately stand in Velcoffers or Demon Lord Bluts damage puddles/Demon Lord Marnoxes moving Fire Pillars just to trigger Pain Barrier.