Not only is it possible--pre-pandemic, it was easily one of the Top 5 most traveled pedestrian thoroughfares in New England, in terms of people per-hour from, say, 7 am-9:30 am and again from 4-5:30 pm, on weekdays. Being the primary pedestrian corridor from South Station to the Financial District.
The only places in New England I could possibly conceive of as having higher pedestrian throughput at anytime, 24/7/365, would be South Station/North Station/Logan Airport/DTX station*, Fenway, Gillette, Great Woods.
(*annoyingly, the MBTA hasn't updated its passenger volumes handbook in ages, I believe...)