Morel has made 9 errors as a MLB infielder, and 7 of them are throwing errors(77%). For comparison, the 15 qualified 3B combined had 47% of their errors be throwing errors. We don't have the split for his MiLB career, but we also know this isn't exactly out of character with the scouting report either, especially on the left side of the infield(6 of 7 errors throwing). So if the net result is Morel gets to more balls than Madrigal but those put greater strain on his (superior) arm to make the play, then I think you're maximizing the situations that lead to his errors and I don't know if you come out ahead.
That said, the optimistic takeaway you could make here is that this is a mechanics issue, there's not a huge risk of him being stone handed and kicking 30 balls so possibly with repetition you can help drill him in avoiding those errors. But as we've talked about before, the left side of the infield isn't exactly a place he lacks reps, so you'd hope to have seen more progress by now to be particularly optimistic.