We hear who the intended readers are for the Directory on Popular Piety and the Liturgy (DPPL). It’s a hierarchical thing: first bishops, then clergy, then heads of religious communities:
5. The operative proposals of this Directory, which are intended solely for the Latin Church and primarily for the Roman Rite, are addressed firstly to the Bishops, whose office entails presiding over the worshipping community of the dioceses, promoting the liturgical life and coordinating other forms of worship (Cf. Lumen Gentium 21; SC 41; Christus Dominus, 15; Directorium de pastorali ministerio Episcoporum, Typis Polyglotis Vaticanis 1973, 75-76, 82, 90-91; CIC, can. 835, ‘ 1 and can. 839, ‘2; Vicesimus quintus annus, 21.) with it. They are also intended for the Bishops’ closest collaborators – their episcopal Vicars, priests, deacons and especially the Rectors of sanctuaries. These proposals are also intended for the major Superiors of the institutes of consecrated life -both male and female, since many forms of popular piety arose within, and were developed by, such institutes, and because the religious and the members of the secular institutes can contribute much to the proper harmonization of the various forms of popular piety with the Liturgy.
It is true that some forms of piety were developed by lay people within religious “institutes.” (Vatican-speak for religious communities.) But the responsibility for harmonization lies with the ordained.