A carpenter won't be forced to learn shearing to get his bow-strings anymore.
Instead having to use a weapon to kill animals to get them by himself, though most characters end up having some kind of weapon skill no matter their focus, anyways.
Potential trade between carpenters and shearers/tailors would be replaced with potential trade with butcher/hunter type characters.
So the RP potential around it is shifted, but not removed, and it'd be forcing people less when it comes to picking up additional skills due to a lack of players.
Entrails are also, afaik, only used for sausages atm and otherwise thrown away. This change would fix that, while thread would still be as useful as ever, it being the main resource of tailoring.
Beyond all that, while realism isn't the focus of the dev team, in this case it will do anything but hurt RP.
Archers and carpenters alike can reference medieval bows and their entrail strings from online sources, and use this in their RP to add more life to it. Whether it be their emotes of the crafting process, bow maintenance, pulling off string or the characters own spoken knowledge, wherever it fits.
So I'd say the change doesn't really have any negatives.