Doing the sums, this means that less than .007% of movements involved a reported Airprox
The problem with that line of argument is that it is like saying that 0.007% of children left alone with an adult get sexually molested, so paedophiles do no harm.
Or, since there has never been a GAT/CAT midair, one should be able to dismantle all controlled airspace. Clearly, the evidence does not support the need for CAS at all.
One needs to approach it differently. How many MPs and Lords are involved in this sport? That is the key to everything in the UK - or anywhere else for that matter. Write to them. Write to your MP. No use complaining to the CAA.
The proposal for paragliders to carry transponders (I haven't read it myself so taking the above poster's word for it) is comparable in barmy-ness to the one from the DfT (which uses the CAA as its consultant on just about everything) to kick out foreign-reg planes out of the UK after a parking period of 90 days.