I presume the rationale is that at Club meetings. apart from competitor family groups / hangers on, the number of spectators (or guests in MSV speak) is minimal, and the risk of infection is thus also minimal. At an Elite event such as BTCC, you can get spectators literally cheek to jowl, which is not a good image, these days.
If (fingers crossed) CSCC can run the Oulton event on the 10th of April, I'm sure it will be no-spectator. Which will cost Oulton about £300 in lost income
- which they can probably save by one less person on the gate.....