If MJ is so useful medically, wouldn't it be healthier (and easier to control dosage) to injest it, rather than expose your lungs to all that smoke? Hot smoke

If MJ is so useful medically, wouldn't it be healthier (and easier to control dosage) to injest it, rather than expose your lungs to all that smoke? Hot smoke can't be good for your airways. And eventually, can't the active substances be put into pill form?