The "simple" types will usually have several things going for them:
1) no transponder, so a vertical CAS bust will not be detected
2) flying lower down, so less likely to get picked up on primary
3) if they are seen to bust CAS, the low level contact is likely to be intermittent so they can't be traced all the way back home
4) flying non-radio, so even less likely to be traced
5) sticking to well known local area!
whereas nobody is going to buy say a SR2x/TB20 for local bimbles.
Remember only traced aircraft will be reported in the statistics, which means basically those who are being good boys, with Mode C and are on the radio.