I get the distance thing.. but..
Various painters paint at different scales, and i get the impression (sometimes) the larger the scale the less the small details matter..
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Some time ago i had a 1/6 portrait painted by a company located in South Korea, and the results blew me away.
If i was to send my Reg Power Girl portrait off to them, they would/could paint the lips, teeth, eyes to next level. I guess it is all in the price
..i went on to use the services of the same company (357 PARTMENT) to repaint the eyes on my Prime 1 Reika, and they delivered amazing results!

(they also fixed the hair paint, which Prime 1 forgot to paint)
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Prime 1 - Reika 1/4 scale with repainted eyes.
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This is how poor the eye's looked originally.
Direction off, no shine, and what appears to be low quality decals?