Flight Schools are likened to snake oil salesman or double glazing salesmen.
Some are but some ain't. Flight schools might be able offer cheaper prices per hour if their aircraft ain't just sitting there doing nothing half the time.
There's a big problem with the tax regime in Europe which adds significant costs to everything.
There's also a big problem with cancellations due to weather which can ground the fleet for many hours. The instructor's paycheck might be affected too.
Maybe a way of going around this problem is equipping for IFR flight. So operations can continue in blue skies on top.