Definitely not so! My "OE" GPS units (GNS 530 and 430 combination) have a 1,000 user waypoint memory bank. Many of these are used and I very often create new ones.
Presumably you fly to private heli sites, or do some specialist work (electricity pylon inspection)?
There are people posting here who do specific types of commercial work, not relevant to fixed wing GA. You may as well be talking about surveying GPS units...
I just cannot identify any aspect of private flying in Europe with that sort of thing. There is simply no need for such bizzare procedures. The aviation GPS databases are packed with countless thousands of waypoints and it is generally trivial to knock up any desired route using wholly predefined waypoints. Sometimes one ends up a few miles off the shortest route but the actual impact on the ETE is barely noticeable so it is not worth putting effort into an inherently error-prone procedure.