BSVUSDT
Bitcoin SV / Tether USD
crypto Composite

This is getting interesting. BSV crawling up the CMC ranking. Only 11 PoW ahead.

BSV is governed by the BSV foundation.

BSV is a dead project ran by a conman maintained by a defunct company who never did manage to update the code in line with their claimed goals. Incompetence and fraud.

Its winner take all, if you have gold as a SoV, and Fiat for transactions, and then you make gold as transaction capable of fiat, why buy Gold? Value comes from the network of users, just use Fiat that has a SoV - Fiat inflates, that inflation is the only driver for gold, without inflation why no one needs gold.
BCH, BSV, XEC forks all lack a growing or critical mass network effect. They're still viable, just not enough demand.

The short version is BTC maxis see BCH/BSV as attempts to change the rules via a fork rather than build on top, so to them it's not "another flavor," it's a different asset altogether. And it kinda makes sense.
The store of value vs everyday spending split you're describing is basically what lightning was built to solve without needing a separate chain or bigger blocks, so from their pov there's no gap left to fill
Also BSV specifically has a lot of baggage since it's tied to Craig Wright's Satoshi claims, which got hit with a UK court ruling that he's not Satoshi. That alone makes a lot of people write it off regardless of the tech argument. Not saying how it should be but that's just how it is.

Why not Bitcoin Cash and/ or BSV

The fact you think I *must* form my opinions based on what youtubers tell me is why im saying youre projecting your ignorance.
Ok lets rewind to the bch fork
Some people think (incorrectly) that blocks need to be bigger. They do what they can to convince others of the same, as you say. So they change some code and fork. Now I own both btc and bch. If there was some big miner/exchange/whale effort to crash the value of one I still have the other, so i havnt really lost any value. Same with BTG, BSV, etc.
Also, notice that every hardfork is a sloppy fix for an issue bitcoin faces, it tries to fix a problem but introduces tradeoffs that arent worth it, or are at the very least, not obviously worth it. These hardforks are usually pushed by some personality. All hardforks are otp-in, which means it everyone who is pro-fork vs every who is anti, neutral, hesitant, and simply uninformed.
Objective upgrades like segwit, taproot are soft-forks because 
1. They upgrade with network with little to no tradeoffs
2. They are backwards compatable. Back in august 2017 chosing BCH could cost you everything (if you decided to sell btc, thinking its inferior) choosing to use segwit or not cost nothing, if you like it you can keep it, if not go back to pre-segwit addresses
Same with taproot
Good bitcoin upgrades take time, lots of smart people try to figure out how to upgrade the network in the most effecient, backwards compatible way possible.
Hardforks are simple ideas pushed by people with egos that blind them from the reality that their idea sucks and only "narrative followers" instead of people that think for themselves will join them.