Aloe pearsonii is threatened by several factors. These include overgrazing and mining operations in its habitat as well as illegal plant collection. The plant's need for an extreme hot and arid climate limits the success with which it can be cultivated in many ill-suited gardening conditions.
Gardeners are encouraged to plant only such plants as are likely to grow in their area. Those with more enterprise and industry can study and simulate the special conditions that a cherished item will require. Plant species known to be threatened, i.e. those becoming extinct in our time, should only be planted by those who have the requisite skills. And no plant growing in nature should be removed illegally to do this.
The suggestion is that planting an endangered species should only be attempted by those who have successfully grown non-threatened plants needing similar conditions as the target plant. Or obtain help from a professional. Seed or cuttings obtained legally would be a good starting point. And beware commercially traded plants illegally obtained! Make sure of your source. This rule of thumb is likely to increase the survival percentage of endangered plants grown by plant enthusiasts.