Once again, this experience really doesn't generalize. I worked in one fully remote job and the company did not care whether employees had prior experience working remotely and did not generally believe that people who worked remotely before would be any better at it than people who had not. There's not really a "skill set" for working remotely, mostly because so many companies require remote coordination between different office locations that even if you work in an office these days, it absolutely requires all the same remote-specific skills that a fully remote worker would have to utilize.
I've also generally experienced developers being hostile to candidates we wanted to hire when they had active projects on GitHub or they had high-reputation Stack Overflow accounts. It's very idiosyncratic whether developers try to cut people down and emphasize only dimensions of achievement that they personally excelled in, or if they take a humbler approach and have a more open mind about a variety of ways that a developer can demonstrate skills. But by no means is it common for people to look positively on GitHub activity. Most often, interviewers just ignore it and believe it's not relevant to their job and prefer you to complete silly programming trivia. But occasionally they go further and even actively hold it against you in petty ways.
Overall, I'd say it's no easier to get remote jobs by already having a remote job.
“Yep. After I had proven experience working remotely with a known company the offers started to come more frequently.”
I’m just trying to point out that this isn’t useful for most people: it wouldn’t work that way.
It seems like you unrealistically need to assert that there can be no downsides, even for others, about the particular remote working experiences you have had. Even so far as to make some sweeping, judgmental comment about me based on the very wrong presumption about my prior remote work.
I hope your insecurities about your choices will subside so you can admit that the risks implied by your advice are too severe for most people to consider abd negate most of the upsides you talked about.
I've also generally experienced developers being hostile to candidates we wanted to hire when they had active projects on GitHub or they had high-reputation Stack Overflow accounts. It's very idiosyncratic whether developers try to cut people down and emphasize only dimensions of achievement that they personally excelled in, or if they take a humbler approach and have a more open mind about a variety of ways that a developer can demonstrate skills. But by no means is it common for people to look positively on GitHub activity. Most often, interviewers just ignore it and believe it's not relevant to their job and prefer you to complete silly programming trivia. But occasionally they go further and even actively hold it against you in petty ways.
Overall, I'd say it's no easier to get remote jobs by already having a remote job.