I can't speak for anyone either in here or anywhere else for that matter. But, I've been in the fortunate position over the last few years to be able to afford to 'do things differently' - i.e. away from the norm.
I learnt to play on a Jazz bass. It was great - but not great enough. Hence I ended-up with my 4001. For what this is worth, I also had an Aria bass during the 80's. Cost next to nothing, played fantastically and sounded great! Just proves that you don't have to spend a fortune to get a good bass (I sold it and have regretted it since). But around that sort of time I had the opportunity to buy another expensive bass in the 4001 league.
So, I played a Fender Precision and a Squire Precision. I played a few other basses too - a Wal, a Gibson Thunderbird and some sort of headless Status.
The Thunderbird I'd always liked the look of, and was sort of drawn towards because I liked the RD1 but had never (and still never) had the chance to play. It was awful - a dead plank of wood. Singularly the worst bass I have ever played.
Next up - the Precision. Foul. No other word for it. I couldn't believe Fender wanted a small fortune for what was, essentially, a baseball bat screwed on to a piece of wood, with one single pick-up thrown in for good measure.
The Wal - someone had told me that these were custom built. Not much better than the Precision but with a largely inflated price tag! No ring, no sustain and basically - not much going for it! Horrible.
The Squire Precision - ?200 at the time I seem to remember. Now - this was quite something for the amount of money, and ultimately I decided to pass on the grounds of one pick-up. Very different to the Squires of today I'm sure!
The headless Status was great - all graphite! Considering this was mid-80's, this was new territory! I was very impressed with it but the cost ultimately was out of my league, but not by much. Otherwise I would have bought one.
I eventually bought a JayDee Mark King Supernatural - wrong decision, I should have bought the Status...
There is a point to this ramble of mine. The thing is that it must be each to their own. Not all of us are professional musicians (I'm not). Not all of us can afford what we really want. Or want to be seen with.
Alembic, to my knowledge, do not (publicly) endorse anyone (I stand to be corrected on this). If I were a famous bass player, I would go with whatever paid me the most money! What I record with behind closed doors is up to me! Replicating an Alembic bass sound FOH would be a nice challenge for most sound engineers I would have thought :-)
You can't blame anyone for going for the deal that suits them best. I hope the bass in question finds a good home - but I'm sure that people who can afford basses at this sort of price level aren't bass guitar abusers ;-)
Cheers,
Rog