I see the Sch's movement speed buff the same way I saw Whm's powerful healing kit in Stormblood.

Nice to have but really not needed for anything and most certainly won't be designed around having in the party.

I know this for a certainty because all healers in Shadowbringers had access to Respose(which was cruelly ripped from Whm for the sake of a single role quest at lv80) which made every raid group have access to Sleep, every single one, now please tell me what fight in the entire expansion required Sleep.

If they ain't going to design around something we will have what makes you think they'll design around something only 1 job will have. They ain't so it falls under "nice to have but unnecessary" and that was what they spent most time on Sch and highlighted as a bullet point, I am sorry Sch mains were treated that way.