The problem: one link, several networks
TikTok does offer icons that connect Instagram and YouTube directly on your profile, but those shortcuts are limited and do not cover every case (other networks, a shop, contact). And the free link field is still just one. So you cannot show everything cleanly in your bio alone.
Swapping the link by hand depending on what you want to push is exhausting and costs you clicks. A link page settles it for good: it shows Instagram, YouTube and everything else side by side.

