Malthusian doomsaying is based upon bad math, and doesn’t account for technological advances. Thanks to decades of scare-mongering, the West is about to enter a demographic winter over absurd notions from the 1970’s and earlier. Unfortunately, many people won’t realize the horrible consequences until its too late.
Welllll, not exactly, and in opposing it you need to be very careful about your own assumptions.
Malthusian doomsaying is based on a particular model of food production (it's often assumed to be fixed, or nearly so), and the extrapolation of population against that fixed amount of food. The underlying theory is sound -- it's the inputs, particularly the extrapolation of food supplies, that's in error.
Your objection is based on the fact that technological advances have allowed farmers to produce more food than predicted, and to keep up with population growth. And that's unquestionably a good thing.
What your objection does not address, though, is the fact that technological advances are not the only factors that affect food production.
Extended cold, for example, or widespread drought, or a pervasive pest or disease, could have long-term effects that technology cannot address for an extended amount of time.
If such were to occur, the Malthusian dynamics of population vs. food come back into play. Those populations most affected by a global drop in food production (for any reason) would almost certainly be in the less technologically advanced areas .... which also happen to have the highest populations and population growth.