Any Lindor trade would have to come with an extension. Otherwise i agree with you, not worth giving your prospect capital for 1 year.
My vision is that Lindor is an elite SS whereas Bo is average there right now. Bo has a better chance being elite at 2B or maybe even 3B just given by the nature of the position. So instead of having 2 average players at their positions like we have now, you have 2 elite ones.