The security costs for on and off chain is a zero sum game - very clear to get.
Follows that if you want a secure bitcoin you have to maximize on chain, known to be the most secure thing for about 9 years now.
Precisely. Wall Street, Blockstream, and the Centralized Bankers can have the sidechains that nobody uses.
If people really do want sidechains they can just use altcoins - that's effectively what alts have been used for 2+ years.
Nice to see it laid out plainly and simply.