I would say this is just a case of 'investment' and AM using money where it is offered, and IF worthwile to persue.
Compare it to Mclaren being owned -in part- by Arab investors.
There aren't any Bahraini Arab or Middle Eastern drivers in a Mclaren either.
I think it does make sense for it to happen, BYD investing.
Not a bad thing though, it's a bit pompeous to claim Stroll's career wil end soon, no way at all.
Stroll will remain part of the team, and for the time being, Lance won't go anywhere either.
It was announced that there is a vision/path that AM(R) is taking, and this doesn't surprise me one bit.
If this deal comes through, then expect BYD to be futured on f.e. front wing end plates, airbox, rear wing end plates, mirrors. That would be enough to gain that extra 'exposure' they'd be interested in, and as for the rest, well, then Aston Martin will be part of BYD anyway, and as mentioned, Daimler is also in the mix.
It makes sense as a business platform investment. Won't have much influence to the race team, nor will it do MUCH in the automotive industry either.
What it will do is both gain more exposure for BYD itself and all it's marques and future models that are in the pipeline, both in Europe as in the entire globe (specifically electric vehicles), and I'm sure it makes it also 'easier' to 'introduce' Aston Martin itself more to the Chinese/Asian market.
Remember for example Lotus. Which used to be - and perhaps still is, as i haven't been keeping tabs - owned by Proton and Geely in the past. Not that in that case, there was an 'agressive expension' plan, which does currently exist with Aston Martin, but it's an example of how a 'business' can invest/own a brand.