At least in the current system, if I saw an app with "ratings disabled" I would assume the ratings are terrible and the developer doesn't want me to see that.
If in a future system I could see that the app had disabled ratings from its initial release, I would assume the developer anticipated the ratings to be mediocre to poor.
I install apps that have no ratings, from a package manager without any centralized rating system whatsoever, all the time. The basic curation by the distro maintainers is enough for me.
At most I look at wiki or into the docs if the app may do what I want it to do for me, before giving the app a try.
I don't have any pre-judice against apps with no in-app store ratings. If I can find the documentation/source code/review online, and the app seems to do what I need, that's good enough for me.
I also install apps with no ratings in environments where that's the norm.
But on the Apple or Google app stores, it's not the norm, and an application that stands out as "this developer has opted to disable ratings" among lots of 4-star and 5-star apps looks different in context, compared with a package in Debian, RedHat or Homebrew.
If it becomes commonplace for well-regarded developers to opt out of ratings, that's different, then it might start to look favourable.
If in a future system I could see that the app had disabled ratings from its initial release, I would assume the developer anticipated the ratings to be mediocre to poor.