KG - I think you're just really overestimating how long it would take an elite HS kid like Veen to reach that Majors.
Yelich (who Veen's been compared to) was drafted in 2010 and reached the majors in 2013 and became a full time starter in 2014 at age 22.
J Upton - drafted 2005, debuted in 2007 and full time starter in 2008
Correa - drafted 2012, full time starter in 2015
Jarred Kelenic - drafted 2018, probably would have reached AAA this year and the majors in 2021
Obviously this is no guarantee, but to assume 6 years is a bit odd.