Flocculencio
Donor
India has that--there are just swamps to drain first, in some cases. And swamps didn't prevent the settlement of the southeastern US.
That still doesn't give you necessarily useful land- and there are large numbers of locals there too. It's not like this is terra nullis (or a place where there are easily ignored tribal jurisdictions)- in India the land would still be under the jurisdiction of either the local government or the Raj itself and there would have to be a really good reason for either to really want large numbers of white settlers.
One point is that the British authorities hated the idea of "poor whites" cluttering up their subcontinent because they felt it provided a very poor propaganda example to Indian elites. This was one reason why British regiments in India were so strictly separated from the actual Indian populace.