I guess the situation would be is if the team does not think there is a franchise LT on the board when they pick. In that case, though, it means that at least two of Tua, Jeudy, Lamb, and/or Simmons are on the board.
The question then is if you think Josh Jones can be a franchise left tackle (I 100% do and think he can start at that position in a ZBS next season). If the Browns do not, though, then I imagine they trade down for massive value.
To me, options 1-5 should be drafting one of the tackle prospects, even if you think they are really a guard in the NFL. Last I checked, Wyatt Teller is not a stud at right guard, and while I do not love using a top-10 pick on the interior offensive line, it is more important in a ZBS than a gap scheme.
If the Browns really do not believe in one or two of the prospects, though, then I think the team absolutely needs to trade down. There are too many long-term holes on the defense as well as two key ones on the offensive line to reach for when you could very likely turn that first into a first this year and multiple seconds, or potentially even a first next year.