Of course, 7 or 8 is a huge, unheard of price, but these guys are pretty well respected NFL media guys and that was the kind of picks package they were suggesting.
Just because they're NFL writers doesn't mean that their opinion is gospel truth, but I'm not sure it's "crazy."
Let's say you did five firsts. What's the "hit rate" on first-round picks? On the podcast, it's suggested that it's about 50%. So with five firsts, you're probably getting, on average, 1-2 busts, 1-2 starters, and 1-2 pro bowlers. Of course, it needs to be taken into consideration that these guys are all on cap-friendly deals.
If somebody called and offered the Chiefs 5 firsts today for Mahomes, let's say middle of the pack team, do you think they would accept?