Newer packaging-related PEPs require TOML, and many developer tools use TOML by choice, but a fresh install of Python couldn't actually read it. That required workarounds from tool and library maintainers, making it more complicated to support as many users' preferences and ways of working as possible.
However you prefer to work, your tools may now be easier to test and maintain. This change is good for everyone.
These files are already in toml, so it's only "unnecessary" if you ask for them to switch the file format.
Otherwise, adding tools to the standard library to read file formats required by the ecosystem is a good idea, regardless of whether you agree with the particular format.
However you prefer to work, your tools may now be easier to test and maintain. This change is good for everyone.