It is already the case that the financial services sector is piling in to make money out of offset. And since scarcity will pay them rich rewards you can be sure that they are going to restrict supply. In that case assuming the availability of offset opportunities when suggesting a route to net zero is naive at best, and profoundly misleading at worst.
High prices being the solution to high prices. For, of course, when seeing the vast amounts to be paid for offsets folks will go create more offsets.
Has he even reached that chart on page 3 of the standard Econ textbook yet?