You do not have to do pictures at all, no one forces you
Do as much as you like, but on a daily driven path with no changes, IMHO 2-3 times is ok, esp. on the way to work the setting around does not change much (sun in front/back, masses of folks around,..).
But it could be nice to see that area in winter (snow), summer, spring,...
And if something changes, e.g. constructions alongside.
My way to work is no more coverd by my mapillary tracks, but that area is mostlky covered with my fun rides I do in between.