Do you believe BCH or SV has any merit?
Are people just too stubborn to accept change?
Do people want to continue to pay enormous fees like how they did the last bull run?
The reason why people fork a coin is they want to have their own coin or they want to be in the decisive position for their own popular coin.
Bitcoincash was the logic of Chinese miners and mining related companies. They had some success but were hit hard by the last bear market.
Bitcoin SV was a concept of Craig Wright and his followers, they are largely hype based.