It's not wrong, it's just based on the assumption that the projects wants contributors.
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.
"Crafting an email" in the format required by many email-based projects is hardly easy for the average user, who's most likely using a webmail service that does not have much control over line wrapping and the like. Accepting patches in attachments (instead of the email body) helps with this, but naive users can still easily get caught by using HTML email, which many project maintainers love to performatively turn up their noses at.
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.