Don't know how often I can say it...it's situational. If they pull back from a higher level team, recruitment might be off the table (it's not happening say in an AYSO united silver team)? What's holding the kid back in grades (just because the kid puts in the time doesn't mean that they are going to be raised) and how locked in is the gpa at this point? How wedded are they to UC Riverside and what are the other public/private options? How are they interested in spending their time in both high school and college? What else they got going on? Are they a white, upper middle class girl from Los Angeles California who wants to go pre-med, or a Latino first gen. college guy from the barrio in Phoenix that wants to major in Arabic?So, say one of these kids on the team with college options I described. Kid has a 3.5 GPA. Kid's time is pushed to the max with soccer and school. Do you encourage him/her to pull back on soccer (not quit, just less time commitment) and put more time into study or keep at it because of sunk costs?
You seem to be saying it's never worth it, while I'm saying sometimes it is...the better argument is where in between that line is drawn for which there's substantial room for disagreement