CY, As far as the lights, I would like to point out that if the ??? was told to leave them on and he did not follow instructions, then he may even be told directly on ??? to turn them back on.
Told directly? I’ll have to look into that. I do recall that there’s no issur to be ????.
R’ Moshe didn’t quite hold that timers were the same as ????? ????”?; his position was a bit more nuanced than that. He was mattir timers for lights, even where ????? ????”? would be problematic.
Gambling has ruined many a family. Even if technically muttar, it’s a bit seedy. Horseracing is not quite as bad as casino gambling, as it has an element of sport in it. It’s still not necessarily an endeavor I would recommend for a nice Jewish boy, but I think it may be a bit much to call involvement a chillul Hashem.