You're not trading Bo to open up a spot for Jimenez, that's just an ancillary part to it. Just like you wouldn't trade Vlad with Horwitz in mind, you'd trade him to maximize value before he leaves, and then stick Horwitz at 1B full time as the in house replacement. In this case, Bo already has one foot out the door, so you're just speeding up the process.
As far as trading Bo and competing in 2025, as unlikely as it would be to compete without Bo, how likely it is to compete with him? I wouldn't rule it out completely, especially with some smart off season moves (and a new front office!!), but the 2023 team required completely unsustainable pitching performance/health to sneak into the playoffs, and the 2024 team is the result of that unsustainability crashing back to earth. What can we reasonably expect with this same group one year older and one year closer to FA in 2025? You can trade Bo and still make an effort to compete. Ideally you get a piece or two for him that could help the 2025-30 teams, stick Jimenez at short, and then reallocate the saved money to fill another need(s). Or use that money to sign one of the FA SS's. Whatever, just be a little creative and retool rather than what we saw in 2017-18. I'm not saying that's going to work any better than running it back, but if you're going to aim to contend every year due to ownership mandate, then you can't expect to just let important FAs walk without getting anything in return when the team can't draft or develop talent on its own.
Of course, if Bo is hurt, or other teams are offering literally nothing, then that changes things, but I have a hard time believing Bo's value would be that shot with 3 bad months at his age and the fact that he has one more cost certain year of control.