That is what it is all about, isn't it? Loving one another.
Why can't we understand that? Why can't I?
If the local ordinary of the place permits variations to the ritual of washing the feet of the faithful in imitation of Christ when he washed the feet of the disciples, who am I to make a big deal of it? If the pastor of the parish I go to does it and I'm uncomfortable with it (I'm not) then I can go to another church or offer it up and pray a chaplet or something. Getting upset or angry, or watching for errors and recording abuses is probably not the best disposition for approaching Holy Communion.
The USCCB addresses the question here:
Because the gospel of the mandatum read on Holy Thursday also depicts Jesus as the "Teacher and Lord" who humbly serves his disciples by performing this extraordinary gesture which goes beyond the laws of hospitality, the element of humble service has accentuated the celebration of the foot washing rite in the United States over the last decade or more. In this regard, it has become customary in many places to invite both men and women to be participants in this rite in recognition of the service that should be given by all the faithful to the Church and to the world. Thus, in the United States, a variation in the rite developed in which not only charity is signified but also humble service. - Read more at USCCB"This is the latest statement of this Secretariat on the question. No subsequent legislation or instructions have necessitated a modification in the statement."
Top photo: Evidently there is a trend amongst Protestants of the bride and groom washing one another's feet. I used the photo because it reminded me of Christ the Bridegroom washing the feet of his disciples.
Christ the Bridegroom