Not all third rounders are the same. Fannin, who almost always lines up wide, was drafted at 67. Kelce was 63. Raridon was 95. Almost any team that thought Raridon was likely to put up those numbers would have drafted him in round 2 or 3. I would say if the Patriots thought he was likely to put up those numbers, they would have packaged picks to go get him.
There basically is one inline TE in the past ten years drafted after 90 that puts up those numbers- George Kittle. To be clear, I love the optimism and I will root for him. I would rather be wrong and have him be great, than be right and have him be average. But, people are predicting Hall of Fame numbers for a end of the 3rd round pick- which is made even more difficult for an inline Y TE.