I guess we argue here that owners have a responsibility to keep cats in at night because that's when they do most of their hunting...which has meant the decimation or extinction of many native species in Oz. Not sure if that is a consideration where you are.
Other than that, I am damned if I know what to say.
I do think it is mean to keep any cats that aren't perfectly happy with it indoors all the time... (Miranda is, Oscar was miserable, and I never meant to move him to an apartment with me, but the people who had offered to take him reneged).
Of course, your cat has much more chance of being hurt when he is outside (personally, I can never bear to find one of my cats severely injured and in agony on the road, as I did one of them) but he IS living a natural cat sort of life.
I dunno Roger...mebbe next time get one of the breeds of cat which attach themselves passionately to their owner, and WANT to be with you most of the time... and tend to thrive indoors?
As for nermal, all I can do is express empathy with your problem.