The Eagles are not the only team paying their QB a lot of money who aggressively use free agency. Prescott isn't holding us back from doing that, just like Purdy won't be for the 49ers. It's up to the GM to build a team around those QBs that can win. The GM here has not done that, but he hasn't done it in 30 years whether he was paying a QB a lot or a little.
Prescott was making $9 million in 2021, the year Matthew Stafford made $19.5 million and led the Rams to a Super Bowl title because the Rams also spent in free agency to build a team around him that could win it all.