>however, according to Reddit, there’s a number of people who want to be left alone and can be irritated if you interrupted their workout to talk.

My suggestion would be not to read social advice on public websites on the internet, especially on Reddit, because per public internet, everything is not okay/forbidden, everyone should mind their own business, choose the safest and the most inoffensive action in every possible social situation. Public places such as reddit are full of terminally online socially awkward people who are very unrepresentative of people in real life. Also, there are incentives to recommend the safest course possible because then you won't get downvoted by haters. I don't even say to take advice there with a grain of salt. I say it's probably better not to read such stuff because your brain might subconciously internalize that people think like this even though actully, in real physical world, it works differently.