Proposed contributions can in fact have negative value, if the contributor implements some feature or bug fix in a way that makes it more difficult to maintain in the long term or introduces bugs in other code.
And even if such contribution is ultimately rejected, someone knowledgeable has to spend time and effort reviewing such code first - time and effort that could have been spend on another, more useful PR.
Quite obviously, any incidental friction makes this ever so slightly harder or less likely. Good contributions don't necessarily or only come from people who are already determined from the get go. Many might just want to dabble at first, or they are just casually browsing and see something that catches their attention.
Every projects needs some form of gatekeeping at some level. But it's unclear to me whether the solution is to avoid platforms with high visibility and tools that are very common and familiar. You probably need a more sophisticated and granular filter than that.
You can easily craft an email for that. No need to create a full PR.
For one, it's semantic: It's only a contribution if it adds value to a project.
What you probably mean is that "not everything handed to us is a contribution". And that's valid: There will be a lot of issues, code, discussions, ideas, and what more that substract, or have negative value. One can call this "spam".
So, the problem to solve, is to avoid the "spam" and allow the contributions. Or, if you disagree with the semantics, avoid the "negative value contributions" and "allow the positive value contributions".
A part of that solution is technical: filters, bots, tools, CI/CD, etc. Many of which github doesn't offer, BTW. A big part is social and process: guidelines, expectations, codes-of-conduct, etc. I've worked in some Open Source projects where the barriers to entry where really high, with endorsements, red-tape, sign-offs, wavers, proof-of-conducts etc. And a large part is simply inevitable "resources". It takes resources to manage the incoming stuff, enforce the above, communicate it, forever, etc.
If someone isn't willing to commit these resources, or cannot, then, ultimately, the right choice to make is to simply not allow contributions - it can still be open source, just won't take input. Like e.g. sqlite.
It's that sense of superiority that pisses me off.
Many maintainers condescendingly reply "contributions welcome" in response to user complaints. People like that had better accept whatever they get. They could have easily done it themselves in all their "high quality" ways. They could have said "I don't have time for this" or even "I don't want to work on this". No, they went and challenged people to contribute instead. Then when they get what they wanted they suddenly decide they don't want it anymore? Bullshit.
You're making the assumption that these are "high quality" projects, that someone poured their very soul into every single line of code in the repository. Chances are it's just someone else's own low effort implementation. Maybe someone else's hobby project. Maybe it's some legacy stuff that's too useful to delete but too complex to fully rewrite. When you dive in, you discover that "doing it properly" very well means putting way too much effort into paying off the technical debts of others. So who's signing up to do that for ungrateful maintainers for free? Who wants to risk doing all that work only to end up ignored and rejected? Lol.
Just slap things together until they work. As long as your problem's fixed, it's fine. It's not your baby you're taking care of. They should be grateful you even sent the patches in. If they don't like it, just keep your commits and rebase, maybe make a custom package that overrides the official one from the Linux distribution. No need to worry about it, after all your version's fixed and theirs isn't. Best part is this tends to get these maintainers to wake up and "properly" implement things on their side... Which is exactly what users wanted in the first place! Wow!
