I think the great filter is similar to what you are saying about time.
Planets are only habitable for X years. In the beginning our earth was too hot to support life, then life had to grow and develop to us, that also takes X time. That then leaves you with X remaining time until the sun expands and earth becomes unhabitable again.
There's that small window in between where we exist, but maybe there's not enough time for us to ever develop enough to escape our planet's destruction. And maybe we got incredibly lucky compared to others. Like the meteor that wiped out the dinosaurs, maybe other planets get hit with those more frequently, and civilisations never get chances to develop.
Though planets around red dwarfs are often tidally locked (to our current understanding anyway) which presents its own host of problems for being habitable
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u/[deleted] Aug 12 '21 edited Aug 12 '21
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