I mean I don't particularly agree but I can understand the sentiment.

That's not what I'm saying just harms his clients though. There's obvious (almost entirely domestic, probably counter productive as to UK politics) lobbying value in that. It's the part where he sends confessions back to the UK regulators privately that just harms his clients.

The high-profile, public, Arkell vs. Pressdram type response increases public awareness.

Without that, he’s just a guy with a blog, and can’t effect any real change. Whether it harms or benefits his clients or not is likely a question of politics. If these responses drum up enough attention that his GRANITE act gets passed, that’s arguably a better outcome for each client jointly and severally than just ignoring the letters.