What do you think about me asking strangers in a restaurant to change the subject of their dinner conversation.
Why would you ask them to change their topic? It would make many people uncomfortable.
Of course it's uncomfortable, their topic is: work and nothing else. I hate topics like that
If you are so socially awkward that you have to butt in on someone's conversation just because you don't like it, then perhaps a restaurant is not the best place for you. Try going to a more secluded place, or even stay home, so that you aren't bothered by others.
I think you are the one who needs to be more social.
It shouldn't matter to you what the topic of someone's conversation is if they are not conversing with you.  It would be best to ignore the conversation being had.