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Your post ignores the human failings that can occur in any otherwise good, workable system.
If a LAE forgot part of the service, would you scrap the Public Cat as it was flawed? There are statistics that show PubCat aircraft are more likely to have an engine failure soon after a service. An alarming number of GA engine failures are fatal. Should we scrap the LAE system?
Microlights are simple aircraft, with restrictions on their use which creates a safe, affordable category of aircraft/flying. The training of pilots is geared towards microlights in that PFLs are drummed in and basic maintenace is part of the sylabus.
One person who ignores a service schedule does not make a fleet of dangerous aircraft.
Microlight pilots are able to carry out their own basic maintenance, but many do not, prefering an experienced mechanic to do it for them. Alteration of the primary structure or the power plant requires an inspector's signature. Changing the oil and plugs does not.
To perform trial flights, the pilot must hold at least an AFI rating.
As for posts on the microlighters' group, the grieving was done 15 months ago and the pilot was well known in the part of the country where I live. Any loss of life in aviation is always sad and your comment implies that the microlight fraternity don't give a toss about the pilot or his passenger. Nothing could be further from the truth.
There are many questions missing from the AAIB report and there are many opinions in the report which neither help air safety nor have they any basis in fact. It is understandable for people affected to react in a protectionist way.