Obviously it is a counterfactual but no serious leftist would say that China without market reforms wouldn't have eradicated poverty, and moreover done it faster and more completely. The seeds of poverty alleviation were planted during the Maoist era; improvement in health, education improvement, and industrialization.
To corroborate your point you can just look at life expectancy in rural communities to see that it rose steadily throughout the Maoist period and then froze during the Dengist reforms
Obviously it is a counterfactual but no serious leftist would say that China without market reforms wouldn't have eradicated poverty, and moreover done it faster and more completely. The seeds of poverty alleviation were planted during the Maoist era; improvement in health, education improvement, and industrialization.
To corroborate your point you can just look at life expectancy in rural communities to see that it rose steadily throughout the Maoist period and then froze during the Dengist reforms