I think clear look at unearned runs scored off the infield reveals that infield defense is indeed valuable. And not just unearned runs either: sloppy play constantly results in “hits,” and extra pitches, and earlier hooks, and tired pens.
infield defense is important.
Is Alberto any better at 3B? In 2019, his overall defense was splendid, with 6 outs above average in the infield. He hit considerably better as well, so maybe 2019 was an outlier. In 2020, he hit badly, and was terrible on defense, minus 3 at 2B and zero at 3B. Zero is allegedly average.
Ruiz was also Zero OAA at 3B so they are basically equal, though more in-depth looking would probably reveal an edge for one or the other. However, They both hit LOUSY, so there’s clearly no reason to keep either one.