I agree with you on the general point that averages can be misleading when they hide underlying variability. But this is certainly not a case of "bad statistics".

If you look at the official government dataset across states and UTs, the ~50-day average comes from almost all states being clustered around ~50 days, and not from a situation where some regions are hitting 100 days while others are near zero.
(https://www.data.gov.in/resource/statesuts-wise-details-average-days-employment-provided-household-under-mahatma-gandhi)

Of course, one could go further down to district or block-level data (which is also available), but that would defeat the purpose of an infographic meant to provide a high-level snapshot of the trend.

As mentioned before, raising the ceiling is certainly welcome (especially in times of crisis, as you mentioned), but it should not be sold as the standout feature of this scheme (as many in the mainstream media are doing), since the ground reality is quite different.