Your concern is understandable. It is natural that you would not want to wait for another 2-3 years to publish your paper. However, the reviewers' suggestion is also valid and it would definitely be interesting to see how far the proposed program can be executed and to what effect. From your question, it is clear that you do wish to execute the study in the future. So one possible solution could be presenting the current study as the first of a two-part study. You can reply to the reviewers' comment saying that you definitely plan to execute the program, but you intend to write another paper in the future which will include the feedback received from the same participants after they have used the program for some time. Explain the situation to the reviewers as clearly as you have done here.
Another option is to change the focus of the study slightly. For example, the study can focus more on the need for the educational program, how you identified the need, and then lead to the survey and the proposed program. Thus, the need for education can be the main focus and the proposed program can be a recommendation. This is just an example, and you can change it in the way you feel would work best. You could also take the advice of your supervisor or a senior colleague about the best way to change the focus. In case the reviewers are still not satisfied and reject your paper, you can submit it to another journal.