I agree, and yet here we are. If it wasn't built with automake I would even consider getting wheels built on the projects behalf, but I can't make heads or tails of M4.
EDIT: But let's not pretend getting cibuildwheel going for every supported variant of PythonMajVer/OS/(32/64) bit is an easy lift for small open source projects. Conda is still more ergonomic than this, although it's slowly dying because big projects have the manpower to stand up and maintain the CI pipeline for PyPI, so Conda is less and less necessary.
EDIT: But let's not pretend getting cibuildwheel going for every supported variant of PythonMajVer/OS/(32/64) bit is an easy lift for small open source projects. Conda is still more ergonomic than this, although it's slowly dying because big projects have the manpower to stand up and maintain the CI pipeline for PyPI, so Conda is less and less necessary.