It's not. Dunno what you want me to say. Most money in football for most players isn't guaranteed. High draft picks get some, quarterbacks and high profile free agents get a lot. Guys like Boettger? Nope.
Except on goalline and short yardage and who will probably have at least a handful of touchdowns. Who did you want that was going to start day one as a late 3rd round pick?
Which in all seriousness begs the question. Do you put 20 pounds on him for tackle or take 20 off and have a 6'8" 290lb TE with those measurables only quicker. He played basketball, he can catch.