"Most people" arent too bright. Thor is an absolute stud and knowledgeable Met fans thought a straight up trade of the two was a loss for us and it turned out to be. The only guy i that would be a fair trade straight up would be Bryant and its a trade that would help both teams immensely for years to come. But at this point neither would make that trade as both guys have established themselves as absolute studs! I think its safe to say barring any health issues for either we as fans can expect Bryant to win an MVP someday and Thor to win a Cy young while both of their teams should win a title or two.
I think you overvalue pitching comparative to how players are actually traded. I strongly doubt any team would trade a hitting prospect the level of Bryant for any pitcher. It's just too risky with arm injuries these days. And don't get me wrong Syndergaard is a player I would like to have had on the cubs but just look at top 25 pitchers the past several years. Here's some top 25 pitchers given 5 years of development
2010
2. Stephen Strasburg, rhp, Nationals
5. Brian Matusz, lhp, Orioles
9. Neftali Feliz, rhp, Rangers
14. Madison Bumgarner, lhp, Giants
17. Martin Perez, lhp, Rangers
18. Jeremy Hellickson, rhp, Rays
22. Aroldis Chapman, lhp, Reds
23. Tyler Matzek, lhp, Rockies
24. Casey Kelly, rhp, Red Sox
25. Kyle Drabek, rhp, Blue Jays
2009
1. David Price, lhp, Rays
4. Tommy Hanson, rhp, Braves
7. Brett Anderson, lhp, Athletics
9. Madison Bumgarner, lhp,
10. Neftali Feliz, rhp, Rangers
11. Trevor Cahill, rhp, Athletics
21. Rick Porcello, rhp, Tigers
22. Chris Tillman, rhp, Orioles
25. Brian Matusz, lhp, Orioles
2008
3. Joba Chamberlain, rhp, Yankees
4. Clay Buchholz, rhp, Red Sox
7. Clayton Kershaw, lhp, Dodgers
8. Franklin Morales, lhp, Rockies
9. Homer Bailey, rhp, Reds
10. David Price, lhp, Rays
15. Jake McGee, lhp, Rays
17. Wade Davis, rhp, Rays
21. Rick Porcello, rhp, Tigers
24. Nick Adenhart, rhp, Angels
As you can see, it's a mine field. There's obvious success stories like Bumgarner, Price, and Kershaw but then you have a number of guy like Joba who aren't even amazing relievers. Certainly you have hitters who don't live up to potential too but even a guys like Colby Rasmus/Pedro Alvarez who were top 10 during that time frame contributes more than any reliever does. That's the danger with trading for pitching because unless they end up a starter you usually lose outside of rare circumstances where you're Chapman and are an utterly dominant closer.