Many people are very busy with their families and many other things, and they don’t have time to experience or meditate on the lam-rim themselves, but they can help others who are doing retreat and giving their lives to that (meditating on the lam-rim). They can give other people the opportunity to practice.
Support for retreat places and retreatants can be advertised like that. Many people will understand that; they can’t do retreat themselves, but they can give others the opportunity to do retreat.