Hello Ionut Paduretu, SilverStorm03 is no longer on the team so I will be handling this on their behalf.  They decided to tag these ways as highway=pedestrian because the place=square multipolygon for Scuarul Libertății ( https://www.openstreetmap.org/relation/13816568 ) was already tagged as highway=pedestrian, so setting these to match was mainly for consistency.  It also falls in line with the description of squares and plazas on the highway=pedestrian OSM wiki page ( https://wiki.openstreetmap.org/wiki/Tag:highway%3Dpedestrian#:~:text=relative%20to%20region.-,Squares%20and%20plazas,-%5Bedit%20%7C). I do see how these could be interpreted as footways as well, and I see that you have already changed them to highway=footway, so either way is fine. Thanks for reaching out and happy mapping!