kengr

Most stars would look white in the system, regardless of what color an instrument would read. The human visual system automatically corrects for color balance. That's why photos taken under old incandescent lights turn out brown, even though the photographer thought everything looked fine at the time.

Many red dwarf stars are known for their huge flare activity. This includes Proxima Centauri, the closest star. We know there are several planets there, some of them in the "Goldilocks Zone" where they could have liquid water, but with the flares - which contain a huge amount of UV - life is very unlikely. (This actually came up during gaming last night; we're playing something based loosely on _The Expanse_.)

Another thing to consider is the age of stars. Alpha and Beta Centauri are much older than Sol, though still firmly on the main sequence. So, any life bearing planets there, even with plate tectonics turning things over, would likely be inimical to us. (Australia is the oldest continent on Earth. It has the most poisonous octopus, the most poisonous snail, the most poisonous jellyfish, the largest crocodile (the salty, or sea crock) the most poisonous mammal, the most poisonous spider, the most poisonous snake, etc. For a long while, possibly extending into historic times, it had a land reptile which could eat a Komodo Dragon in one bite. Ah, Australia; how can't you kill us more than any other place. :-)