One might consider that if Enclosure did not increase total food production productivity per person, then the peasants would have had to just keep working the land like they did before. I'm not saying the peasants had better lives as industrial workers than as feudal farmer workers (they probably did not), but maybe in the long run more people will have better lives. Same problem today with automation.
I am not very receptive to those kinds of argument, arguing for widescale criminal/immoral acts today to justify a better future. Sounds very "Final Solution"-esque to me. And everytime this argument is used to justify an action in the present, it is much weaker as it presents merely a "possible" better future. However, you are applying an after the fact justification. There are many actions that justified themselves on the basis of a better future, but failed to deliver.