the 'ideal' triple has chainrings spaced 10T apart.
on paper, there is a lot of overlap, but in use, there aren't as many as you think.
on a 10sp cassette with the small ring, you should only use the first 7 cogs.
in the middle ring, you should use the middle 8 cogs.
in the big ring you should use the last 7 cogs.
it's possible to use the other 8 combinations but this results in an extreme chain angle, increased wear and also results in a lot of excess noise.
put in the way of a car, sure you can hit 32mph in 1st gear, but should you? nope, you should use 3rd/4 or 4th/5.