I find it pretty disingenuous to put this in the footnote and brush it off as "not having enough space", and then went on to justify it with an opinion from someone who clearly has stake in this space.
Equating whales with professionals is just completely missing the point, and is simply marketing speech that masks the underlying problem.
A lot of mechanisms in Gacha games are engineered dark patterns whose sole purpose is to make money. They are basically there to exploit those who are psychologically more susceptible.
It's ironic that the author uses Genshin Impact as an example and then went on to say something about spending more money in Gacha game is a reflection of professionalism. In Genshin Impact you can power up A LOT by spending money on Gacha because you can get substantially better equipment that is otherwise unavailable through normal game play, or you can power up your existing characters, too. Can someone instantly become better at skating with a better pair of skates?