In effect, yes. Given that ~70% of revenue goes to rights holders, making the amount of revenue bigger by not paying 30% of subscriptions to Google, the savings are passed on to rights holders.
It's net revenue split to rights holders according to the share of streams. If you have 1% of all streams on Spotify in a given time period, you get 0.7% of net revenue for that period.
How the rights holders distribute the money onward to the artists is not exactly transparent though.
...I mean, 30% of the savings go to Spotify, so some part of it will indeed go to stock buybacks and executive salaries. Some of it will go to regular employee salaries, and some of it will go to pay for technical infrastructure, and some of it will go to pay for offices. Some of it will be spent on marketing, even.
Spotify announced stock buybacks in 2021 that were greater in total that they most likely will pay artists in that same timeframe. Doing so artificially depresses the the amount of their revenue that's counted as profit, which is what they use to calculate artist royalties.
Again, not true - the royalty payments are based on revenue, not profit.
To understand how absurd the claim that royalty payments are based on profits is, consider that Spotify has had a grand total of two profitable quarters throughout its whole existence - are you seriously claiming that no artist ever got paid outside those two quarters?