There's a balance though. Some people want to end up with a perfect PR that gets applied, some just want the change upstream.

Most of my PRs are things where I'm not really interested in learning the ins and outs of the project I'm submitting to; I've just run into an issue that I needed fixed, so I fixed it[1], but it's better if it's fixed upstream. I'll submit my fix as a PR, and if it needs formatting/styling/whatevs, it'll probably be less hassle if upstream tweaks it to fit. I'm not looking to be a regular contributor, I just want to fix things. Personally, I don't even care about having my name on the fix.

Now, if I start pushing a lot of PRs, maybe it's worth the effort to get me onto the page stylewise. But, I don't usually end up pushing a lot of PRs on any one project.

[1] Usually, I can have my problem fixed much sooner if I fix it, than if I open a bug report and hope the maintainer will fix it.