I really don't understand the logic here (I've mentioned this before).
If Arch Manning is less interested in Texas because of Ewers, it means he sees Ewers as a threat to him playing. If Manning sees Ewers as a threat, it means he believes Ewers is a stud QB who will have won the starting QB job and will have success running it prior to Manning being on Campus. If Ewers wins the starting job and has success running it, Ewers will be in the NFL after the 2023 season. If Ewers is in the NFL after 2023, Ewers and Manning will have only overlapped on campus during Manning's true freshmen season.
So, is Manning really going to bump down a school because he doesn't have a clear shot at starting as a true freshmen? I'd think as a 5 star QB an ideal development path would be to redshirt (or at least be 2nd string with limited action) as a true freshmen, start 2 years, go pro.