I think that a flying school which is completely honest with its students should offer two types of PPL:
1. Standard PPL (to show your mates you can fly)
2. A Useful PPL (to go places; the present PPL plus an IMC Rating)
Of course in reality this would not generate much business because of the general shortage of IFR capable aircraft available for rental (at any price) and the required currency for IMC flight.