[whimsicalism]

Because they are selling them as carbon credits in carbon markets for full price per ton of CO2 using fraudulent measures of how much carbon is additionally being averted (additionality). To be clear, the bad actors are those selling the credits claiming that these properties would have been chopped down otherwise (not the property owners).

Then actors like Apple, airlines, etc. get to claim they have fully offset their supply chain despite nothing of the sort occurring because of counterfeit carbon credits.

e: And fwiw, I have done analysis of this offline as part of a personal project - based on what I saw looking at global forestry data, the evidence is strong that the vast majority of REDD (deforestation) carbon credits are fraudulent IMO - areas being sold at the cost of carbon if the whole plot was cut down despite there being effectively no risk of that.