Experience, skill, and training are all relevant to any instructor who is taking care to meet standards.
And standards allow for OC deco divers to include deco in their MOD1 training.
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My instructor did not push me to do deco and incorporate helium into my training. I requested both. I wanted to be able to dive deeper than 100' and to be able to do some deco.
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If my instructor deems that I have adequate buoyancy and the other necessary skills (including the proper mindset) to do CCR deco dives, what's the problem?
No problem. Do what you want. Just my opinion. I don't care about standards, I'm not a pro, I'm not bound by anything.
I think that it's a bad idea for a brand new CCR diver to do deco. I think that it was a bad idea for you to do it. Even with your awesome buoyancy skills and excellent instructor. Even though you really wanted to do it. Even though you got away with it.