Can't edit questions on meta posts; unable to gain reputation on them

Question

I wanted to edit this question's title which is on Mathematics Meta Stack Exchange because it did not have anything to do with the question itself. However, I could not edit it. When I tried to edit it, it brought me this message:

Suggested edits are not allowed on non-tag-wiki posts on meta sites.

Then, someone else came to edit the question's title. He was not a moderator, he just had way more reputation than me (I had 159, and he had 10k+).

You also cannot gain privileges in Meta. At least that was what I saw in the Activity tab. So do I have to get 2k reputation on the main site to edit it, or is there something wrong? I'm relatively new to the site, and I rarely use Meta.

Answer 1

Reputation on per-site metas is derived straight from the corresponding main site, and privileges you earned there will be carried over to the meta site.

See the help center page on per-site metas:

Votes on meta do not affect your reputation; your meta reputation is the same as your reputation on Mathematics Stack Exchange (synchronized hourly), though you earn separate badges. You must have 5 reputation [on the main site] to participate on meta.

Note that this site, Meta Stack Exchange, works differently: as this site isn't linked to a single particular main Q&A site, this site has its own reputation and privileges earned for participation here. This is the opposite of how things work on site metas.

As far as why per-site metas don't allow suggested edits, this was because at the time that rule was established nearly a decade ago, per-site metas had very low traffic and not enough people were reviewing, and it just...never got changed. There's an active feature request asking that this be changed, which you can support.