You're not saying stupid things, just a different take on them. I dive with my pony charged and mostly off (valve cracked to maintain pressure as I descend).
You do you.
But, I don't understand that "valve cracked to maintain pressure" thing.
At recreational depths, a regulator charged at the surface is in no danger of being overcome by ambient pressure on descent. So, there is no point in the valve being cracked. It should either be all the way on or all the way off. Or, another way of saying it, if there is any reason for it to be on at all, it should be on all the way.
You mentioned a risk of losing your air supply. If you are worried that having your pony turned on all the way somehow puts you at risk of that, I think you are adding risk to your dive for a perceived risk that is not a concern.
The worst case I can think of that might be what you're thinking of is if your pony bottle 1st stage blows a HP seat and starts dumping gas. Sure, if that happens and your valve is only cracked open that would keep you from losing your gas as quickly. But, well, so? It's your independent, redundant gas. If that happens and you lose your whole pony bottle, well, so? Dive over and get out. You're still breathing just fine off your primary gas, which you're not losing. Also, if that happens, you will know it. You'll hear it and probably feel it. You can turn your pony off then. Yes, it will take a little longer than turning off a cracked valve. Again, so? It's your redundant backup gas. When it happens, dive over. No big deal.
None of that is as risky as swimming with a gas supply that has the valve just cracked open.
Anyway.... </derail>
Congrats on the new suit. It looks like it fits you well. Glad to hear it's dry!