If I'm understanding him correctly, Puciek is referring to the fact that nobles used to rely heavily on the purchase silver command, which made it easy to come up with cash for frivolous on-the-fly expenses or instantly add wings to entire mansions. However, it was also assumed, though perhaps not often RP'd out, that the money did in fact come from somewhere.
I did the fairly broke noble thing, and I get it -- it's hard to play the part you applied for if you don't have the resources, and sometimes you don't know what you're getting into until you're in the thick of it (case in point: newer players apping in for noble roles). Part of the fun should be spreading the silver around, but often you're left pinching pennies together instead, and it takes work to build up the cash (and work seems like the antithesis of being a noble). I don't have anything against giving nobs a tier 3 asset, if they want it, or giving them a little more starting silver (retainers ARE expensive). Neither of these things seem game-breaking to me, but there are ways to address the issue ICly, too.
Nobs do have something gentry don't and will never have, and that's serious clout. Nobs can use that creatively to their advantage, by offering favors, political support, marriage prospects, and so on in return for cheaper goods or services. If you want to save face, you can explain that much of your resources are tied up in your domain, on the way, or otherwise being funneled toward building a mansion. New homes do take time to build (often many months, IRL), so it's fine to grab a free phome at the Bluebird for a while and then move it over and add a few rooms when you've amassed the necessary funds (if you don't want to be living in an unfinished castle).