Thats literally just not true.
Have you seen NFL salaries at WR and Safety?
Only 6 Safeties in the NFL make over $10M/yr. 14 WRs make over $10m/yr
23 Safeties make over $5M/yr while 41 WRs in the NFL make over $5M/yr
....and his upside at Safeties isn't all that much more at WR.