Heading off a tantrum is bad enough at home, but when you go out to dinner with a child on the spectrum, you go armed with lots of blind faith and a nest of bunnies up your sleeve. Even typical kids can struggle in a restaurant setting. The usual preparations apply double so with kids who have extra needs.
If you have a child with autism or a similar condition, it's all too tempting to avoid going out. After all, who wants the stress and hassle of dealing with possible behaviours in public? (Not least of which the glaring eyes from ignoramuses who just assume you're a crap parent.)