Honestly if they're claiming Watson is worth 3 1's then dak is as well.
Watson is under contract, Dak is not.
If they were both under contract, I'd agree with your sentiment.
As of now, your only guarantee is that Dak makes $37.69 million and a team can tag him again (a third time) in 2022 for around $55 million. So basically a 2-year deal at around $93 million. No team is giving up valuable assets (multiple high draft picks) and face having to pay Dak under Franchise Tag money the next 2 years,
So, some of you will want to argue that of course a team would obviously have to agree to an extension with Dak as part of any deal being made. This assumes the Cowboys don't place the Exclusive Tag on him again. Meaning he can't be signed to an offer sheet. Dallas would then have to grant Dak's agent the ability to talk to other teams and negotiate a contract before Dallas can then negotiate a trade. Again, Dak would continue to have all of the leverage because he could simply tell the new team he will not sign a long-term deal with them. The Jones do not appear to be in a place where they would allow Dak to talk to other teams. At least not now, there are a few months between when Dak would have the Tag actually placed on him and when the July deadline is to get a deal done. If things are not going well in contract talks, I could see Jerry allowing for that possibility (teams negotiating with Dak's agent) in the summer. No team wants to be in a situation where they might have to tag a Quarterback 3 years in a row.