> management without technical excellence track is just misguided

It's different technical excellence.

What's not given proper weight is that it's different technical excellence. Roles seen as "more management" demand system-level understanding and technical knowledge. And a technical knowledge that includes what many see as not technical such as awareness of people or finance dynamics. They can, should be seen as technical aspects. A more senior, "more management" role has different levers to use to make projects come through. And these are different higher level projects. A more senior role is also free to juggle reports who specialize in this or that. If you hate or you are bad at task scheduling, have someone do that for you. If you are not great at writing speeches, etc, etc.

Among the ways you can prepare for that: (1) find at least one mentor (someone at least two steps more senior who can guide you on what to think about and on how things work. If the people two steps up in your company are bros... your mentors don't have to be in your same company.) (2) Consider what's missing to your skillset - and that's not planning software but maybe it is.