The contention all along has been over the relative risks of infection between the different groups.
You can only discuss that quantitatively.
I have just shown that the tiny proportion of straight people being infected is becoming a yet smaller proportion.
There are estimated to be about 500 000 MSMs in UK.
That is less than 1%
That means that their rise in infection matches the rise in population, while for straight people it is about 250 times lower.