Thank you for this valid and good question. You are one of the few players who have most (or all?) required assets in the ecosystem, so you would naturally have considerations the are different from a large majority of other players. Having said that, and while typing this, I can think of the following reasons that this may interest you as well (and I may be completely wrong, of course):

1. This post is primarily about reducing the massively overprinted supply of CL cards, which are driving down ALL card prices in the market, including yours. So a large burn of those excess (and un-needed) cards would help you as well, if supply reduces and market prices increase to a more rational (not excessively high) level. Powerful cards priced almost at (or below) burn value are not good for anyone IMO.

2. The CL set is so strong that one can get to Champ III or even Champ II in Wild with only those cards. If new players can just buy CL cards for peanuts and hand them over to a bot to play and earn for them, without having to purchase other cards, that, again, is bad for the ecosystem and it drives the value of rarer cards down. So removing the glut of CL cards to rationalise their price will, again, help everyone, including yourself.

3. I am sure you also have MANY more CL cards than you need in your collection. Burning those very cheap cards for the much rarer RB cards can increase your asset value, as RB will always be in short supply due to the much better sale/burn mechanics of this set.

Anyway, that's what I got from the top of my head in response to your question. Hope it made at least some sense. If not, you of course know better what your priorities and interests are.

Best.